diff --git a/api/src/Kurs.Platform.Application.Contracts/FileManagement/FileManagementDtos.cs b/api/src/Kurs.Platform.Application.Contracts/FileManagement/FileManagementDtos.cs
index 2bbdc879..ef12f513 100644
--- a/api/src/Kurs.Platform.Application.Contracts/FileManagement/FileManagementDtos.cs
+++ b/api/src/Kurs.Platform.Application.Contracts/FileManagement/FileManagementDtos.cs
@@ -1,8 +1,8 @@
 #nullable enable
 
 using System.ComponentModel.DataAnnotations;
-using System.IO;
 using System.Collections.Generic;
+using Volo.Abp.Content;
 
 namespace Kurs.Platform.FileManagement;
 
@@ -32,12 +32,10 @@ public class UploadFileDto
     [Required]
     public string FileName { get; set; } = string.Empty;
     
-    // Either FileStream or FileContent can be used
-    public Stream? FileStream { get; set; }
-    
-    public byte[]? FileContent { get; set; }
-    
     public string? ParentId { get; set; }
+    
+    // ActivityModal pattern - Files array
+    public IRemoteStreamContent[]? Files { get; set; }
 }
 
 public class SearchFilesDto
@@ -52,4 +50,20 @@ public class BulkDeleteDto
 {
     [Required]
     public List<string> ItemIds { get; set; } = new();
+}
+
+public class CopyItemsDto 
+{
+    [Required]
+    public List<string> ItemIds { get; set; } = new();
+    
+    public string? TargetFolderId { get; set; }
+}
+
+public class MoveItemsDto
+{
+    [Required]
+    public List<string> ItemIds { get; set; } = new();
+    
+    public string? TargetFolderId { get; set; }
 }
\ No newline at end of file
diff --git a/api/src/Kurs.Platform.Application.Contracts/FileManagement/IFileManagementAppService.cs b/api/src/Kurs.Platform.Application.Contracts/FileManagement/IFileManagementAppService.cs
index 74bfc42a..b4ee66b5 100644
--- a/api/src/Kurs.Platform.Application.Contracts/FileManagement/IFileManagementAppService.cs
+++ b/api/src/Kurs.Platform.Application.Contracts/FileManagement/IFileManagementAppService.cs
@@ -1,5 +1,6 @@
 #nullable enable
 
+using System.Collections.Generic;
 using System.IO;
 using System.Threading.Tasks;
 using Volo.Abp.Application.Services;
@@ -31,4 +32,10 @@ public interface IFileManagementAppService : IApplicationService
     Task<FolderPathDto> GetFolderPathAsync();
     
     Task<FolderPathDto> GetFolderPathByIdAsync(string folderId);
+    
+    Task BulkDeleteItemsAsync(BulkDeleteDto input);
+    
+    Task<List<FileItemDto>> CopyItemsAsync(CopyItemsDto input);
+    
+    Task<List<FileItemDto>> MoveItemsAsync(MoveItemsDto input);
 }
\ No newline at end of file
diff --git a/api/src/Kurs.Platform.Application/FileManagement/FileManagementAppService.cs b/api/src/Kurs.Platform.Application/FileManagement/FileManagementAppService.cs
index a3114473..a9ff76a5 100644
--- a/api/src/Kurs.Platform.Application/FileManagement/FileManagementAppService.cs
+++ b/api/src/Kurs.Platform.Application/FileManagement/FileManagementAppService.cs
@@ -320,8 +320,12 @@ public class FileManagementAppService : ApplicationService, IFileManagementAppSe
         };
     }
 
-    public async Task<FileItemDto> UploadFileAsync(UploadFileDto input)
+    public async Task<FileItemDto> UploadFileAsync([FromForm] UploadFileDto input)
     {
+        // Debug logging
+        Logger.LogInformation("UploadFileAsync called with: FileName={FileName}, ParentId={ParentId}, FilesCount={FilesCount}", 
+            input.FileName, input.ParentId, input.Files?.Length ?? 0);
+
         ValidateFileName(input.FileName);
 
         // Decode parent ID if provided
@@ -333,14 +337,12 @@ public class FileManagementAppService : ApplicationService, IFileManagementAppSe
 
         var items = await GetFolderIndexAsync(decodedParentId);
 
-        if (items.Any(x => x.Name.Equals(input.FileName, StringComparison.OrdinalIgnoreCase)))
-        {
-            throw new UserFriendlyException("A file with this name already exists");
-        }
+        // Generate unique filename if file already exists
+        var uniqueFileName = GetUniqueFileName(items, input.FileName);
 
         var filePath = string.IsNullOrEmpty(decodedParentId)
-            ? input.FileName
-            : $"{decodedParentId}/{input.FileName}";
+            ? uniqueFileName
+            : $"{decodedParentId}/{uniqueFileName}";
 
         var fileId = EncodePathAsId(filePath);
 
@@ -362,32 +364,29 @@ public class FileManagementAppService : ApplicationService, IFileManagementAppSe
         // Dizini oluştur
         Directory.CreateDirectory(fullCdnPath);
 
-        var fullFilePath = Path.Combine(fullCdnPath, input.FileName);
+        var fullFilePath = Path.Combine(fullCdnPath, uniqueFileName);
 
         long fileSize;
-        if (input.FileStream != null)
+        if (input.Files != null && input.Files.Length > 0)
         {
-            input.FileStream.Position = 0;
+            // İlk dosyayı kullan (tek dosya upload için)
+            var file = input.Files[0];
+            using var stream = file.GetStream();
             using var fileStream = File.Create(fullFilePath);
-            await input.FileStream.CopyToAsync(fileStream);
-            fileSize = input.FileStream.Length;
-        }
-        else if (input.FileContent != null)
-        {
-            await File.WriteAllBytesAsync(fullFilePath, input.FileContent);
-            fileSize = input.FileContent.Length;
+            await stream.CopyToAsync(fileStream);
+            fileSize = stream.Length;
         }
         else
         {
-            throw new UserFriendlyException("Either FileStream or FileContent must be provided");
+            throw new UserFriendlyException("Files must be provided");
         }
 
-        var fileInfo = new FileInfo(input.FileName);
+        var fileInfo = new FileInfo(uniqueFileName);
 
         var metadata = new FileMetadata
         {
             Id = fileId,
-            Name = input.FileName,
+            Name = uniqueFileName,
             Type = "file",
             Size = fileSize,
             Extension = fileInfo.Extension,
@@ -631,6 +630,239 @@ public class FileManagementAppService : ApplicationService, IFileManagementAppSe
         }
     }
 
+    public async Task<List<FileItemDto>> CopyItemsAsync(CopyItemsDto input)
+    {
+        if (input.ItemIds == null || !input.ItemIds.Any())
+        {
+            throw new UserFriendlyException("No items selected for copy");
+        }
+
+        var cdnBasePath = _configuration["App:CdnPath"];
+        if (string.IsNullOrEmpty(cdnBasePath))
+        {
+            throw new UserFriendlyException("CDN path is not configured");
+        }
+
+        var tenantId = _currentTenant.Id?.ToString() ?? "host";
+        var basePath = Path.Combine(cdnBasePath, tenantId);
+        
+        string? targetPath = null;
+        if (!string.IsNullOrEmpty(input.TargetFolderId))
+        {
+            targetPath = DecodeIdAsPath(input.TargetFolderId);
+        }
+
+        var copiedItems = new List<FileItemDto>();
+        var errors = new List<string>();
+
+        foreach (var itemId in input.ItemIds)
+        {
+            try
+            {
+                var sourcePath = DecodeIdAsPath(itemId);
+                var sourceFullPath = Path.Combine(basePath, sourcePath);
+
+                // Get source item name
+                var sourceItemName = Path.GetFileName(sourcePath);
+                
+                // Generate unique name if item already exists in target
+                var targetItemPath = string.IsNullOrEmpty(targetPath) ? sourceItemName : $"{targetPath}/{sourceItemName}";
+                var targetFullPath = Path.Combine(basePath, targetItemPath);
+                
+                var uniqueTargetPath = GetUniqueItemPath(targetFullPath, sourceItemName);
+                var finalTargetPath = uniqueTargetPath.Replace(basePath + Path.DirectorySeparatorChar, "").Replace(Path.DirectorySeparatorChar, '/');
+
+                if (Directory.Exists(sourceFullPath))
+                {
+                    // Copy directory recursively
+                    CopyDirectory(sourceFullPath, uniqueTargetPath);
+                    
+                    var dirInfo = new DirectoryInfo(uniqueTargetPath);
+                    copiedItems.Add(new FileItemDto
+                    {
+                        Id = EncodePathAsId(finalTargetPath),
+                        Name = dirInfo.Name,
+                        Type = "folder",
+                        CreatedAt = dirInfo.CreationTime,
+                        ModifiedAt = dirInfo.LastWriteTime,
+                        Path = finalTargetPath,
+                        ParentId = input.TargetFolderId ?? string.Empty,
+                        IsReadOnly = false
+                    });
+                }
+                else if (File.Exists(sourceFullPath))
+                {
+                    // Copy file
+                    var targetDir = Path.GetDirectoryName(uniqueTargetPath);
+                    if (!string.IsNullOrEmpty(targetDir) && !Directory.Exists(targetDir))
+                    {
+                        Directory.CreateDirectory(targetDir);
+                    }
+                    
+                    File.Copy(sourceFullPath, uniqueTargetPath);
+                    
+                    var fileInfo = new FileInfo(uniqueTargetPath);
+                    var extension = fileInfo.Extension;
+                    
+                    copiedItems.Add(new FileItemDto
+                    {
+                        Id = EncodePathAsId(finalTargetPath),
+                        Name = fileInfo.Name,
+                        Type = "file",
+                        Size = fileInfo.Length,
+                        Extension = extension,
+                        MimeType = GetMimeType(extension),
+                        CreatedAt = fileInfo.CreationTime,
+                        ModifiedAt = fileInfo.LastWriteTime,
+                        Path = finalTargetPath,
+                        ParentId = input.TargetFolderId ?? string.Empty,
+                        IsReadOnly = false
+                    });
+                }
+                else
+                {
+                    errors.Add($"Source item not found: {itemId}");
+                }
+            }
+            catch (Exception ex)
+            {
+                errors.Add($"Failed to copy {itemId}: {ex.Message}");
+            }
+        }
+
+        if (errors.Any())
+        {
+            throw new UserFriendlyException($"Some items could not be copied: {string.Join(", ", errors)}");
+        }
+
+        return copiedItems;
+    }
+
+    public async Task<List<FileItemDto>> MoveItemsAsync(MoveItemsDto input)
+    {
+        if (input.ItemIds == null || !input.ItemIds.Any())
+        {
+            throw new UserFriendlyException("No items selected for move");
+        }
+
+        var cdnBasePath = _configuration["App:CdnPath"];
+        if (string.IsNullOrEmpty(cdnBasePath))
+        {
+            throw new UserFriendlyException("CDN path is not configured");
+        }
+
+        var tenantId = _currentTenant.Id?.ToString() ?? "host";
+        var basePath = Path.Combine(cdnBasePath, tenantId);
+        
+        string? targetPath = null;
+        if (!string.IsNullOrEmpty(input.TargetFolderId))
+        {
+            targetPath = DecodeIdAsPath(input.TargetFolderId);
+        }
+
+        var movedItems = new List<FileItemDto>();
+        var errors = new List<string>();
+
+        foreach (var itemId in input.ItemIds)
+        {
+            try
+            {
+                // Check if this is a protected system folder
+                ValidateNotProtectedFolder(itemId, "move");
+
+                var sourcePath = DecodeIdAsPath(itemId);
+                var sourceFullPath = Path.Combine(basePath, sourcePath);
+
+                // Get source item name
+                var sourceItemName = Path.GetFileName(sourcePath);
+                
+                // Generate target path
+                var targetItemPath = string.IsNullOrEmpty(targetPath) ? sourceItemName : $"{targetPath}/{sourceItemName}";
+                var targetFullPath = Path.Combine(basePath, targetItemPath);
+                
+                // Check if moving to same location
+                if (Path.GetFullPath(sourceFullPath) == Path.GetFullPath(targetFullPath))
+                {
+                    errors.Add($"Cannot move item to the same location: {sourceItemName}");
+                    continue;
+                }
+
+                // Generate unique name if item already exists in target
+                var uniqueTargetPath = GetUniqueItemPath(targetFullPath, sourceItemName);
+                var finalTargetPath = uniqueTargetPath.Replace(basePath + Path.DirectorySeparatorChar, "").Replace(Path.DirectorySeparatorChar, '/');
+
+                if (Directory.Exists(sourceFullPath))
+                {
+                    // Move directory
+                    var targetDir = Path.GetDirectoryName(uniqueTargetPath);
+                    if (!string.IsNullOrEmpty(targetDir) && !Directory.Exists(targetDir))
+                    {
+                        Directory.CreateDirectory(targetDir);
+                    }
+                    
+                    Directory.Move(sourceFullPath, uniqueTargetPath);
+                    
+                    var dirInfo = new DirectoryInfo(uniqueTargetPath);
+                    movedItems.Add(new FileItemDto
+                    {
+                        Id = EncodePathAsId(finalTargetPath),
+                        Name = dirInfo.Name,
+                        Type = "folder",
+                        CreatedAt = dirInfo.CreationTime,
+                        ModifiedAt = dirInfo.LastWriteTime,
+                        Path = finalTargetPath,
+                        ParentId = input.TargetFolderId ?? string.Empty,
+                        IsReadOnly = false
+                    });
+                }
+                else if (File.Exists(sourceFullPath))
+                {
+                    // Move file
+                    var targetDir = Path.GetDirectoryName(uniqueTargetPath);
+                    if (!string.IsNullOrEmpty(targetDir) && !Directory.Exists(targetDir))
+                    {
+                        Directory.CreateDirectory(targetDir);
+                    }
+                    
+                    File.Move(sourceFullPath, uniqueTargetPath);
+                    
+                    var fileInfo = new FileInfo(uniqueTargetPath);
+                    var extension = fileInfo.Extension;
+                    
+                    movedItems.Add(new FileItemDto
+                    {
+                        Id = EncodePathAsId(finalTargetPath),
+                        Name = fileInfo.Name,
+                        Type = "file",
+                        Size = fileInfo.Length,
+                        Extension = extension,
+                        MimeType = GetMimeType(extension),
+                        CreatedAt = fileInfo.CreationTime,
+                        ModifiedAt = fileInfo.LastWriteTime,
+                        Path = finalTargetPath,
+                        ParentId = input.TargetFolderId ?? string.Empty,
+                        IsReadOnly = false
+                    });
+                }
+                else
+                {
+                    errors.Add($"Source item not found: {itemId}");
+                }
+            }
+            catch (Exception ex)
+            {
+                errors.Add($"Failed to move {itemId}: {ex.Message}");
+            }
+        }
+
+        if (errors.Any())
+        {
+            throw new UserFriendlyException($"Some items could not be moved: {string.Join(", ", errors)}");
+        }
+
+        return movedItems;
+    }
+
     public async Task<Stream> DownloadFileAsync(string id)
     {
         var cdnBasePath = _configuration["App:CdnPath"];
@@ -691,6 +923,29 @@ public class FileManagementAppService : ApplicationService, IFileManagementAppSe
 
     #region Private Helper Methods
 
+    private string GetUniqueFileName(List<FileMetadata> existingItems, string originalFileName)
+    {
+        // Check if file name is already unique
+        if (!existingItems.Any(x => x.Name.Equals(originalFileName, StringComparison.OrdinalIgnoreCase)))
+        {
+            return originalFileName;
+        }
+
+        var nameWithoutExt = Path.GetFileNameWithoutExtension(originalFileName);
+        var extension = Path.GetExtension(originalFileName);
+        
+        var counter = 1;
+        string uniqueName;
+        
+        do
+        {
+            uniqueName = $"{nameWithoutExt} ({counter}){extension}";
+            counter++;
+        } while (existingItems.Any(x => x.Name.Equals(uniqueName, StringComparison.OrdinalIgnoreCase)));
+
+        return uniqueName;
+    }
+
     private async Task<FileMetadata?> FindItemMetadataAsync(string id)
     {
         // This is not efficient, but IBlobContainer doesn't have built-in search
@@ -823,5 +1078,54 @@ public class FileManagementAppService : ApplicationService, IFileManagementAppSe
         return new FolderPathDto { Path = pathItems };
     }
 
+    private string GetUniqueItemPath(string targetPath, string originalName)
+    {
+        if (!File.Exists(targetPath) && !Directory.Exists(targetPath))
+        {
+            return targetPath;
+        }
+
+        var directory = Path.GetDirectoryName(targetPath) ?? "";
+        var nameWithoutExt = Path.GetFileNameWithoutExtension(originalName);
+        var extension = Path.GetExtension(originalName);
+        
+        var counter = 1;
+        string newPath;
+        
+        do
+        {
+            var newName = $"{nameWithoutExt} ({counter}){extension}";
+            newPath = Path.Combine(directory, newName);
+            counter++;
+        } while (File.Exists(newPath) || Directory.Exists(newPath));
+
+        return newPath;
+    }
+
+    private void CopyDirectory(string sourceDir, string targetDir)
+    {
+        if (!Directory.Exists(sourceDir))
+            throw new DirectoryNotFoundException($"Source directory not found: {sourceDir}");
+
+        // Create target directory
+        Directory.CreateDirectory(targetDir);
+
+        // Copy files
+        foreach (var file in Directory.GetFiles(sourceDir))
+        {
+            var fileName = Path.GetFileName(file);
+            var destFile = Path.Combine(targetDir, fileName);
+            File.Copy(file, destFile, overwrite: false);
+        }
+
+        // Copy subdirectories recursively
+        foreach (var subDir in Directory.GetDirectories(sourceDir))
+        {
+            var subDirName = Path.GetFileName(subDir);
+            var destSubDir = Path.Combine(targetDir, subDirName);
+            CopyDirectory(subDir, destSubDir);
+        }
+    }
+
     #endregion
 }
\ No newline at end of file
diff --git a/api/src/Kurs.Platform.HttpApi.Host/PlatformHttpApiHostModule.cs b/api/src/Kurs.Platform.HttpApi.Host/PlatformHttpApiHostModule.cs
index 23fe7f68..f28f9961 100644
--- a/api/src/Kurs.Platform.HttpApi.Host/PlatformHttpApiHostModule.cs
+++ b/api/src/Kurs.Platform.HttpApi.Host/PlatformHttpApiHostModule.cs
@@ -10,6 +10,7 @@ using Kurs.Notifications.Application;
 using Kurs.Platform.Classrooms;
 using Kurs.Platform.EntityFrameworkCore;
 using Kurs.Platform.Extensions;
+using Kurs.Platform.FileManagement;
 using Kurs.Platform.Identity;
 using Kurs.Platform.Localization;
 using Kurs.Settings;
@@ -200,6 +201,7 @@ public class PlatformHttpApiHostModule : AbpModule
             options.ConventionalControllers.Create(typeof(NotificationApplicationModule).Assembly);
             options.ChangeControllerModelApiExplorerGroupName = false;
             options.ConventionalControllers.FormBodyBindingIgnoredTypes.Add(typeof(PlatformUpdateProfileDto));
+            options.ConventionalControllers.FormBodyBindingIgnoredTypes.Add(typeof(UploadFileDto));
         });
     }
 
diff --git a/ui/src/services/account.service.ts b/ui/src/services/account.service.ts
index 90727b66..adcb0860 100644
--- a/ui/src/services/account.service.ts
+++ b/ui/src/services/account.service.ts
@@ -100,8 +100,8 @@ export const updateProfile = async (data: UpdateProfileDto) => {
     return await apiService.fetchData({
       url: 'api/account/my-profile',
       method: 'put',
-      data,
-      headers: { 'Content-Type': 'multipart/form-data' },
+      data: formData,
+      // Browser otomatik olarak Content-Type'ı multipart/form-data boundary ile set eder
     })
   } catch (error) {
     if (error instanceof AxiosError) {
diff --git a/ui/src/services/fileManagement.service.ts b/ui/src/services/fileManagement.service.ts
index 9d0adf5c..92678c27 100644
--- a/ui/src/services/fileManagement.service.ts
+++ b/ui/src/services/fileManagement.service.ts
@@ -30,27 +30,44 @@ class FileManagementService {
     })
   }
 
-  // Upload a file
+  // Upload a file (DTO pattern)
   async uploadFile(request: UploadFileRequest): Promise<{ data: FileItem }> {
     const formData = new FormData()
-    formData.append('fileName', request.file.name)
+    formData.append('fileName', request.fileName)
     if (request.parentId) {
       formData.append('parentId', request.parentId)
     }
     
-    // Send the actual file for FileContent property
-    formData.append('fileContent', request.file)
+    // ActivityModal pattern - Files array
+    request.files.forEach(file => {
+      formData.append('Files', file)
+    })
 
     return ApiService.fetchData<FileItem>({
       url: `/api/app/file-management/upload-file`,
       method: 'POST',
       data: formData as any,
-      headers: {
-        'Content-Type': 'multipart/form-data',
-      },
+      // Browser otomatik olarak Content-Type'ı multipart/form-data boundary ile set eder
     })
   }
 
+  // Upload a file directly with FormData (ActivityModal pattern)
+  async uploadFileDirectly(formData: FormData): Promise<{ data: FileItem }> {
+    try {
+      console.log('Uploading file directly with FormData')
+      
+      // ABP convention-based routing: UploadFileAsync -> upload-file (Async suffix kaldırılır)
+      return await ApiService.fetchData<FileItem>({
+        url: 'api/app/file-management/upload-file',
+        method: 'POST',
+        data: formData as any,
+      })
+    } catch (error) {
+      console.error('File upload error:', error)
+      throw error
+    }
+  }
+
   // Rename a file or folder
   async renameItem(request: RenameItemRequest): Promise<{ data: FileItem }> {
     return ApiService.fetchData<FileItem>({
@@ -126,11 +143,29 @@ class FileManagementService {
   // Bulk delete items
   async bulkDeleteItems(itemIds: string[]): Promise<{ data: any }> {
     return ApiService.fetchData<any>({
-      url: `/api/app/file-management/bulk-delete`,
+      url: `/api/app/file-management/bulk-delete-items`,
       method: 'POST',
       data: { itemIds },
     })
   }
+
+  // Copy items to target folder
+  async copyItems(itemIds: string[], targetFolderId?: string): Promise<{ data: FileItem[] }> {
+    return ApiService.fetchData<FileItem[]>({
+      url: `/api/app/file-management/copy-items`,
+      method: 'POST',
+      data: { itemIds, targetFolderId },
+    })
+  }
+
+  // Move items to target folder
+  async moveItems(itemIds: string[], targetFolderId?: string): Promise<{ data: FileItem[] }> {
+    return ApiService.fetchData<FileItem[]>({
+      url: `/api/app/file-management/move-items`,
+      method: 'POST',
+      data: { itemIds, targetFolderId },
+    })
+  }
 }
 
 export default new FileManagementService()
\ No newline at end of file
diff --git a/ui/src/types/fileManagement.ts b/ui/src/types/fileManagement.ts
index 78fdfef9..24af6ef7 100644
--- a/ui/src/types/fileManagement.ts
+++ b/ui/src/types/fileManagement.ts
@@ -37,7 +37,8 @@ export interface DeleteItemRequest {
 }
 
 export interface UploadFileRequest {
-  file: File
+  fileName: string
+  files: File[]
   parentId?: string
 }
 
diff --git a/ui/src/views/admin/files/FileManager.tsx b/ui/src/views/admin/files/FileManager.tsx
index be4d8095..53ed914e 100644
--- a/ui/src/views/admin/files/FileManager.tsx
+++ b/ui/src/views/admin/files/FileManager.tsx
@@ -1,7 +1,22 @@
 import { useState, useEffect, useCallback } from 'react'
 import { Helmet } from 'react-helmet'
 import { Button, Input, Select, toast, Notification, Spinner } from '@/components/ui'
-import { FaFolder, FaCloudUploadAlt, FaSearch, FaTh, FaList, FaArrowUp, FaCheckSquare, FaSquare, FaTrash, FaCut, FaCopy } from 'react-icons/fa'
+import {
+  FaFolder,
+  FaCloudUploadAlt,
+  FaSearch,
+  FaTh,
+  FaList,
+  FaArrowUp,
+  FaCheckSquare,
+  FaSquare,
+  FaTrash,
+  FaCut,
+  FaCopy,
+  FaEdit,
+  FaDownload,
+  FaPaste,
+} from 'react-icons/fa'
 import Container from '@/components/shared/Container'
 import { useLocalization } from '@/utils/hooks/useLocalization'
 import fileManagementService from '@/services/fileManagement.service'
@@ -62,16 +77,19 @@ const FileManager = () => {
       // Backend returns GetFilesDto which has Items property
       const items = response.data.items || []
       // Manual protection for system folders
-      const protectedItems = items.map(item => {
+      const protectedItems = items.map((item) => {
         const isSystemFolder = ['avatar', 'import', 'activity'].includes(item.name.toLowerCase())
         return {
           ...item,
-          isReadOnly: item.isReadOnly || isSystemFolder
+          isReadOnly: item.isReadOnly || isSystemFolder,
         }
       })
-      
+
       console.log('Fetched items:', protectedItems)
-      console.log('Protected folders check:', protectedItems.filter(item => item.isReadOnly))
+      console.log(
+        'Protected folders check:',
+        protectedItems.filter((item) => item.isReadOnly),
+      )
       setItems(protectedItems)
     } catch (error) {
       console.error('Failed to fetch items:', error)
@@ -161,6 +179,11 @@ const FileManager = () => {
   }
 
   const handleItemSelect = (item: FileItemType) => {
+    // Protected öğeler seçilemez
+    if (item.isReadOnly) {
+      return
+    }
+
     setSelectedItems((prev) => {
       if (prev.includes(item.id)) {
         return prev.filter((id) => id !== item.id)
@@ -170,7 +193,21 @@ const FileManager = () => {
     })
   }
 
-  const handleItemDoubleClick = (item: FileItemType) => {
+  const handleItemDoubleClick = (item: FileItemType, event?: React.MouseEvent) => {
+    // Prevent text selection and other default behaviors
+    if (event) {
+      event.preventDefault()
+      event.stopPropagation()
+    }
+    
+    // Clear any text selection that might have occurred
+    if (window.getSelection) {
+      const selection = window.getSelection()
+      if (selection) {
+        selection.removeAllRanges()
+      }
+    }
+    
     if (item.type === 'folder') {
       setCurrentFolderId(item.id)
       setSelectedItems([])
@@ -182,10 +219,22 @@ const FileManager = () => {
     try {
       setUploading(true)
       for (const file of files) {
-        await fileManagementService.uploadFile({
-          file,
+        // ActivityModal pattern'ini kullan - Files array ile FormData
+        const formData = new FormData()
+        formData.append('fileName', file.name)
+        formData.append('Files', file) // ActivityModal pattern - Files array
+        if (currentFolderId) {
+          formData.append('parentId', currentFolderId)
+        }
+
+        console.log('FileManager uploading:', {
+          fileName: file.name,
+          fileSize: file.size,
+          fileType: file.type,
           parentId: currentFolderId,
         })
+
+        await fileManagementService.uploadFileDirectly(formData)
       }
       await fetchItems(currentFolderId)
       toast.push(<Notification type="success">Files uploaded successfully</Notification>)
@@ -239,16 +288,16 @@ const FileManager = () => {
   const handleDeleteItems = async () => {
     try {
       setDeleting(true)
-      
+
       if (itemsToDelete.length === 1) {
         // Single item delete - use existing API
         await fileManagementService.deleteItem({ id: itemsToDelete[0].id })
       } else {
         // Multiple items - use bulk delete API
-        const itemIds = itemsToDelete.map(item => item.id)
+        const itemIds = itemsToDelete.map((item) => item.id)
         await fileManagementService.bulkDeleteItems(itemIds)
       }
-      
+
       await fetchItems(currentFolderId)
       setSelectedItems([])
       toast.push(<Notification type="success">Items deleted successfully</Notification>)
@@ -303,13 +352,13 @@ const FileManager = () => {
     const checkClipboard = () => {
       setHasClipboardData(!!localStorage.getItem('fileManager_clipboard'))
     }
-    
+
     // Check initially
     checkClipboard()
-    
+
     // Check periodically (in case another tab changes it)
     const interval = setInterval(checkClipboard, 1000)
-    
+
     return () => clearInterval(interval)
   }, [])
 
@@ -364,7 +413,9 @@ const FileManager = () => {
 
   // Bulk operations
   const selectAllItems = () => {
-    setSelectedItems(filteredItems.map(item => item.id))
+    // Sadece protected olmayan öğeleri seç
+    const selectableItems = filteredItems.filter((item) => !item.isReadOnly)
+    setSelectedItems(selectableItems.map((item) => item.id))
   }
 
   const deselectAllItems = () => {
@@ -372,120 +423,173 @@ const FileManager = () => {
   }
 
   const deleteSelectedItems = () => {
-    const itemsToDelete = filteredItems.filter(item => selectedItems.includes(item.id))
-    const deletableItems = itemsToDelete.filter(item => !item.isReadOnly)
-    const protectedItems = itemsToDelete.filter(item => item.isReadOnly)
-    
+    const itemsToDelete = filteredItems.filter((item) => selectedItems.includes(item.id))
+    const deletableItems = itemsToDelete.filter((item) => !item.isReadOnly)
+    const protectedItems = itemsToDelete.filter((item) => item.isReadOnly)
+
     if (protectedItems.length > 0) {
       toast.push(
         <Notification title="Warning" type="warning">
-          {protectedItems.length} protected system folder(s) cannot be deleted: {protectedItems.map(i => i.name).join(', ')}
-        </Notification>
+          {protectedItems.length} protected system folder(s) cannot be deleted:{' '}
+          {protectedItems.map((i) => i.name).join(', ')}
+        </Notification>,
       )
     }
-    
+
     if (deletableItems.length > 0) {
       openDeleteModal(deletableItems)
       // Remove protected items from selection
-      const deletableIds = deletableItems.map(item => item.id)
-      setSelectedItems(prev => prev.filter(id => deletableIds.includes(id)))
+      const deletableIds = deletableItems.map((item) => item.id)
+      setSelectedItems((prev) => prev.filter((id) => deletableIds.includes(id)))
     }
   }
 
   const copySelectedItems = () => {
-    const itemsToCopy = filteredItems.filter(item => selectedItems.includes(item.id))
-    const copyableItems = itemsToCopy.filter(item => !item.isReadOnly)
-    const protectedItems = itemsToCopy.filter(item => item.isReadOnly)
-    
+    const itemsToCopy = filteredItems.filter((item) => selectedItems.includes(item.id))
+    const copyableItems = itemsToCopy.filter((item) => !item.isReadOnly)
+    const protectedItems = itemsToCopy.filter((item) => item.isReadOnly)
+
     if (protectedItems.length > 0) {
       toast.push(
         <Notification title="Warning" type="warning">
-          {protectedItems.length} protected system folder(s) cannot be copied: {protectedItems.map(i => i.name).join(', ')}
-        </Notification>
+          {protectedItems.length} protected system folder(s) cannot be copied:{' '}
+          {protectedItems.map((i) => i.name).join(', ')}
+        </Notification>,
       )
     }
-    
+
     if (copyableItems.length > 0) {
       // Store in local storage or context for paste operation
-      localStorage.setItem('fileManager_clipboard', JSON.stringify({
-        operation: 'copy',
-        items: copyableItems,
-        sourceFolder: currentFolderId
-      }))
+      localStorage.setItem(
+        'fileManager_clipboard',
+        JSON.stringify({
+          operation: 'copy',
+          items: copyableItems,
+          sourceFolder: currentFolderId,
+        }),
+      )
       setHasClipboardData(true)
       toast.push(
         <Notification title="Copied" type="success">
           {copyableItems.length} item(s) copied to clipboard
-        </Notification>
+        </Notification>,
       )
     }
   }
 
   const cutSelectedItems = () => {
-    const itemsToCut = filteredItems.filter(item => selectedItems.includes(item.id))
-    const cuttableItems = itemsToCut.filter(item => !item.isReadOnly)
-    const protectedItems = itemsToCut.filter(item => item.isReadOnly)
-    
+    const itemsToCut = filteredItems.filter((item) => selectedItems.includes(item.id))
+    const cuttableItems = itemsToCut.filter((item) => !item.isReadOnly)
+    const protectedItems = itemsToCut.filter((item) => item.isReadOnly)
+
     if (protectedItems.length > 0) {
       toast.push(
         <Notification title="Warning" type="warning">
-          {protectedItems.length} protected system folder(s) cannot be moved: {protectedItems.map(i => i.name).join(', ')}
-        </Notification>
+          {protectedItems.length} protected system folder(s) cannot be moved:{' '}
+          {protectedItems.map((i) => i.name).join(', ')}
+        </Notification>,
       )
     }
-    
+
     if (cuttableItems.length > 0) {
       // Store in local storage or context for paste operation
-      localStorage.setItem('fileManager_clipboard', JSON.stringify({
-        operation: 'cut',
-        items: cuttableItems,
-        sourceFolder: currentFolderId
-      }))
+      localStorage.setItem(
+        'fileManager_clipboard',
+        JSON.stringify({
+          operation: 'cut',
+          items: cuttableItems,
+          sourceFolder: currentFolderId,
+        }),
+      )
       setHasClipboardData(true)
       toast.push(
         <Notification title="Cut" type="success">
           {cuttableItems.length} item(s) cut to clipboard
-        </Notification>
+        </Notification>,
       )
     }
   }
 
-  const pasteItems = () => {
+  const pasteItems = async () => {
     const clipboardData = localStorage.getItem('fileManager_clipboard')
-    if (clipboardData) {
-      try {
-        const clipboard = JSON.parse(clipboardData)
-        if (clipboard.operation === 'copy') {
-          toast.push(
-            <Notification title="Copy" type="info">
-              Copy functionality will be implemented soon
-            </Notification>
-          )
-        } else if (clipboard.operation === 'cut') {
-          toast.push(
-            <Notification title="Move" type="info">
-              Move functionality will be implemented soon
-            </Notification>
-          )
-        }
-      } catch (error) {
-        toast.push(
-          <Notification title="Error" type="danger">
-            Invalid clipboard data
-          </Notification>
-        )
-      }
-    } else {
+    if (!clipboardData) {
       toast.push(
         <Notification title="Clipboard Empty" type="info">
           No items in clipboard
-        </Notification>
+        </Notification>,
+      )
+      return
+    }
+
+    try {
+      const clipboard = JSON.parse(clipboardData)
+      const itemIds = clipboard.items.map((item: FileItemType) => item.id)
+
+      if (clipboard.operation === 'copy') {
+        setLoading(true)
+        try {
+          await fileManagementService.copyItems(itemIds, currentFolderId)
+          await fetchItems(currentFolderId)
+          toast.push(
+            <Notification title="Success" type="success">
+              {itemIds.length} item(s) copied successfully
+            </Notification>,
+          )
+        } catch (error) {
+          console.error('Copy failed:', error)
+          toast.push(
+            <Notification title="Error" type="danger">
+              Failed to copy items
+            </Notification>,
+          )
+        } finally {
+          setLoading(false)
+        }
+      } else if (clipboard.operation === 'cut') {
+        // Aynı klasörde move yapmaya çalışırsa engelleyelim
+        if (clipboard.sourceFolder === currentFolderId) {
+          toast.push(
+            <Notification title="Warning" type="warning">
+              Cannot move items to the same folder
+            </Notification>,
+          )
+          return
+        }
+
+        setLoading(true)
+        try {
+          await fileManagementService.moveItems(itemIds, currentFolderId)
+          await fetchItems(currentFolderId)
+          // Clipboard'ı temizle
+          localStorage.removeItem('fileManager_clipboard')
+          setHasClipboardData(false)
+          toast.push(
+            <Notification title="Success" type="success">
+              {itemIds.length} item(s) moved successfully
+            </Notification>,
+          )
+        } catch (error) {
+          console.error('Move failed:', error)
+          toast.push(
+            <Notification title="Error" type="danger">
+              Failed to move items
+            </Notification>,
+          )
+        } finally {
+          setLoading(false)
+        }
+      }
+    } catch (error) {
+      toast.push(
+        <Notification title="Error" type="danger">
+          Invalid clipboard data
+        </Notification>,
       )
     }
   }
 
   return (
-    <Container>
+    <Container className="px-3 sm:px-4 md:px-6">
       <Helmet
         titleTemplate="%s | Sözsoft Kurs Platform"
         title={translate('::' + 'App.Files')}
@@ -493,126 +597,189 @@ const FileManager = () => {
       ></Helmet>
 
       {/* Enhanced Unified Toolbar */}
-      <div className="bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg p-4 mb-4 mt-2">
+      <div className="bg-white dark:bg-gray-800 border border-gray-200 dark:border-gray-700 rounded-lg p-3 sm:p-4 mb-4 mt-2">
         {/* Main Toolbar Row */}
-        <div className="flex flex-col xl:flex-row xl:items-center justify-between gap-4">
+        <div className="flex flex-col lg:flex-row lg:items-center justify-between gap-3 sm:gap-4">
           {/* Left Section - Primary Actions */}
           <div className="flex items-center gap-2 flex-wrap min-w-0">
             {/* File Operations */}
-            <div className="flex items-center gap-2">
-              <Button
-                variant="solid"
-                icon={<FaCloudUploadAlt />}
-                onClick={() => setUploadModalOpen(true)}
-                size="sm"
-              >
-                Upload Files
-              </Button>
-              <Button
-                variant="default"
-                icon={<FaFolder />}
-                onClick={() => setCreateFolderModalOpen(true)}
-                size="sm"
-              >
-                Create Folder
-              </Button>
-            </div>
-
-            {/* Divider */}
-            <div className="h-6 w-px bg-gray-300 dark:bg-gray-600" />
+            {/* Navigation */}
+            <Button
+              variant="plain"
+              icon={<FaArrowUp />}
+              onClick={goUpOneLevel}
+              size="sm"
+              disabled={breadcrumbItems.length <= 1}
+              className="text-gray-600 hover:text-blue-600 flex-shrink-0"
+              title="Go up one level"
+            />
+            <Button
+              variant="solid"
+              icon={<FaCloudUploadAlt />}
+              onClick={() => setUploadModalOpen(true)}
+              size="sm"
+              className="flex-shrink-0"
+            >
+              <span className="hidden sm:inline">Upload Files</span>
+              <span className="sm:hidden">Upload</span>
+            </Button>
+            <Button
+              variant="default"
+              icon={<FaFolder />}
+              onClick={() => setCreateFolderModalOpen(true)}
+              size="sm"
+              className="flex-shrink-0"
+            >
+              <span className="hidden sm:inline">Create Folder</span>
+              <span className="sm:hidden">Create</span>
+            </Button>
 
             {/* Clipboard Operations */}
-            <div className="flex items-center gap-1">
-              <Button
-                variant="plain"
-                icon={<FaCopy />}
-                onClick={copySelectedItems}
-                disabled={selectedItems.length === 0}
-                size="sm"
-                className="text-gray-600 hover:text-blue-600 disabled:opacity-50"
-                title="Copy selected items"
-              />
-              <Button
-                variant="plain"
-                icon={<FaCut />}
-                onClick={cutSelectedItems}
-                disabled={selectedItems.length === 0}
-                size="sm"
-                className="text-gray-600 hover:text-orange-600 disabled:opacity-50"
-                title="Cut selected items"
-              />
-              <Button
-                variant="plain"
-                onClick={pasteItems}
-                disabled={!hasClipboardData}
-                size="sm"
-                className="text-gray-600 hover:text-green-600 disabled:opacity-50"
-                title="Paste items"
-              >
-                Paste
-              </Button>
-            </div>
+            <Button
+              variant="plain"
+              icon={<FaCopy />}
+              onClick={copySelectedItems}
+              disabled={selectedItems.length === 0}
+              size="sm"
+              className="text-gray-600 hover:text-blue-600 disabled:opacity-50 flex-shrink-0"
+              title="Copy selected items"
+            />
+            <Button
+              variant="plain"
+              icon={<FaCut />}
+              onClick={cutSelectedItems}
+              disabled={selectedItems.length === 0}
+              size="sm"
+              className="text-gray-600 hover:text-orange-600 disabled:opacity-50 flex-shrink-0"
+              title="Cut selected items"
+            />
+            <Button
+              variant="plain"
+              icon={<FaPaste />}
+              onClick={pasteItems}
+              disabled={!hasClipboardData}
+              size="sm"
+              className="text-gray-600 hover:text-green-600 disabled:opacity-50 flex-shrink-0"
+              title="Paste items"
+            />
+            <Button
+              variant="plain"
+              icon={<FaEdit />}
+              onClick={() => {
+                if (selectedItems.length === 1) {
+                  const itemToRename = filteredItems.find((item) => item.id === selectedItems[0])
+                  if (itemToRename && !itemToRename.isReadOnly) {
+                    openRenameModal(itemToRename)
+                  } else {
+                    toast.push(
+                      <Notification title="Warning" type="warning">
+                        Protected system folders cannot be renamed
+                      </Notification>,
+                    )
+                  }
+                }
+              }}
+              size="sm"
+              disabled={selectedItems.length !== 1}
+              className="text-gray-600 hover:text-blue-600 flex-shrink-0"
+              title="Rename selected item"
+            >
+              Rename
+            </Button>
 
-            {/* Divider */}
-            <div className="h-6 w-px bg-gray-300 dark:bg-gray-600" />
+            <Button
+              variant="plain"
+              icon={<FaDownload />}
+              onClick={() => {
+                if (selectedItems.length === 1) {
+                  const itemToDownload = filteredItems.find((item) => item.id === selectedItems[0])
+                  if (itemToDownload && itemToDownload.type === 'file') {
+                    handleDownload(itemToDownload)
+                  } else {
+                    toast.push(
+                      <Notification title="Warning" type="warning">
+                        Only files can be downloaded
+                      </Notification>,
+                    )
+                  }
+                }
+              }}
+              size="sm"
+              disabled={
+                selectedItems.length !== 1 ||
+                (() => {
+                  const selectedItem = filteredItems.find((item) => item.id === selectedItems[0])
+                  return selectedItem?.type !== 'file'
+                })()
+              }
+              className="text-gray-600 hover:text-green-600 flex-shrink-0"
+              title="Download selected file"
+            >
+              Download
+            </Button>
+
+            <Button
+              variant="plain"
+              icon={<FaTrash />}
+              onClick={deleteSelectedItems}
+              size="sm"
+              disabled={selectedItems.length === 0}
+              className="text-gray-600 hover:text-red-600 flex-shrink-0"
+              title="Delete selected items"
+            >
+              <span>Delete {selectedItems.length > 0 && `(${selectedItems.length})`}</span>
+            </Button>
 
             {/* Selection Actions */}
-            <div className="flex items-center gap-1">
-              {filteredItems.length > 0 && (
-                <Button
-                  variant="plain"
-                  icon={selectedItems.length === filteredItems.length ? <FaCheckSquare /> : <FaSquare />}
-                  onClick={selectedItems.length === filteredItems.length ? deselectAllItems : selectAllItems}
-                  size="sm"
-                  className="text-gray-600 hover:text-blue-600"
-                  title={selectedItems.length === filteredItems.length ? 'Deselect all items' : 'Select all items'}
-                >
-                  {selectedItems.length === filteredItems.length ? 'Deselect All' : 'Select All'}
-                </Button>
-              )}
-              {selectedItems.length > 0 && (
-                <Button
-                  variant="plain"
-                  icon={<FaTrash />}
-                  onClick={deleteSelectedItems}
-                  size="sm"
-                  className="text-gray-600 hover:text-red-600"
-                  title="Delete selected items"
-                >
-                  Delete ({selectedItems.length})
-                </Button>
-              )}
-            </div>
-
-            {/* Navigation */}
-            {breadcrumbItems.length > 1 && (
-              <>
-                <div className="h-6 w-px bg-gray-300 dark:bg-gray-600" />
-                <Button 
-                  variant="plain" 
-                  icon={<FaArrowUp />} 
-                  onClick={goUpOneLevel}
-                  size="sm"
-                  className="text-gray-600 hover:text-blue-600"
-                  title="Go up one level"
-                >
-                  Go Up
-                </Button>
-              </>
+            {filteredItems.length > 0 && (
+              <Button
+                variant="plain"
+                icon={
+                  selectedItems.length ===
+                  filteredItems.filter((item) => !item.isReadOnly).length ? (
+                    <FaCheckSquare />
+                  ) : (
+                    <FaSquare />
+                  )
+                }
+                onClick={
+                  selectedItems.length === filteredItems.filter((item) => !item.isReadOnly).length
+                    ? deselectAllItems
+                    : selectAllItems
+                }
+                size="sm"
+                className="text-gray-600 hover:text-blue-600 flex-shrink-0"
+                title={
+                  selectedItems.length === filteredItems.filter((item) => !item.isReadOnly).length
+                    ? 'Deselect all selectable items'
+                    : 'Select all selectable items'
+                }
+              >
+                <span className="hidden lg:inline">
+                  {selectedItems.length === filteredItems.filter((item) => !item.isReadOnly).length
+                    ? 'Deselect All'
+                    : 'Select All'}
+                </span>
+                <span className="lg:hidden">
+                  {selectedItems.length === filteredItems.filter((item) => !item.isReadOnly).length
+                    ? 'Deselect'
+                    : 'Select'}
+                </span>
+              </Button>
             )}
           </div>
 
           {/* Right Section - Search, Sort, View */}
-          <div className="flex items-center gap-3 flex-wrap justify-end min-w-0">
+          <div className="flex items-center gap-2 sm:gap-3 flex-wrap justify-start lg:justify-end min-w-0 w-full lg:w-auto">
             {/* Search */}
-            <div className="flex items-center">
+            <div className="flex items-center w-full sm:w-auto">
               <Input
                 size="sm"
                 placeholder="Search files..."
                 value={filters.searchTerm}
                 onChange={(e) => setFilters((prev) => ({ ...prev, searchTerm: e.target.value }))}
                 prefix={<FaSearch className="text-gray-400" />}
-                className="w-48"
+                className="w-full sm:w-36 md:w-48"
               />
             </div>
 
@@ -652,17 +819,17 @@ const FileManager = () => {
                   setFilters((prev) => ({ ...prev, sortBy, sortOrder }))
                 }
               }}
-              className="min-w-36"
+              className="min-w-32 sm:min-w-36 flex-shrink-0"
             />
 
             {/* View Mode */}
-            <div className="flex border border-gray-300 dark:border-gray-600 rounded">
+            <div className="flex border border-gray-300 dark:border-gray-600 rounded flex-shrink-0">
               <Button
                 variant="plain"
                 size="sm"
                 icon={<FaTh />}
                 className={classNames(
-                  'rounded-r-none border-r',
+                  'rounded-r-none border-r px-2 sm:px-3',
                   viewMode === 'grid' && 'bg-blue-50 dark:bg-blue-900/20 text-blue-600',
                 )}
                 onClick={() => setViewMode('grid')}
@@ -673,7 +840,7 @@ const FileManager = () => {
                 size="sm"
                 icon={<FaList />}
                 className={classNames(
-                  'rounded-l-none',
+                  'rounded-l-none px-2 sm:px-3',
                   viewMode === 'list' && 'bg-blue-50 dark:bg-blue-900/20 text-blue-600',
                 )}
                 onClick={() => setViewMode('list')}
@@ -682,37 +849,13 @@ const FileManager = () => {
             </div>
           </div>
         </div>
-
-        {/* Selection Status Bar - Show when items are selected */}
-        {selectedItems.length > 0 && (
-          <div className="mt-3 pt-3 border-t border-gray-200 dark:border-gray-700">
-            <div className="flex items-center justify-between">
-              <div className="flex items-center gap-2">
-                <span className="text-sm text-blue-700 dark:text-blue-300 font-medium">
-                  {selectedItems.length} item{selectedItems.length !== 1 ? 's' : ''} selected
-                </span>
-                <span className="text-xs text-gray-500">
-                  ({filteredItems.filter(item => selectedItems.includes(item.id)).length} of {filteredItems.length})
-                </span>
-              </div>
-              <div className="flex items-center gap-2">
-                <Button
-                  variant="plain"
-                  size="xs"
-                  onClick={deselectAllItems}
-                  className="text-gray-500 hover:text-gray-700"
-                >
-                  Clear Selection
-                </Button>
-              </div>
-            </div>
-          </div>
-        )}
       </div>
 
       {/* Breadcrumb */}
-      <div className="mb-6">
-        <Breadcrumb items={breadcrumbItems} onNavigate={handleBreadcrumbNavigate} />
+      <div className="mb-4 sm:mb-6 overflow-x-auto">
+        <div className="min-w-max">
+          <Breadcrumb items={breadcrumbItems} onNavigate={handleBreadcrumbNavigate} />
+        </div>
       </div>
 
       {/* Files Grid/List */}
@@ -724,12 +867,11 @@ const FileManager = () => {
         <>
           {/* List View Header */}
           {viewMode === 'list' && (
-            <div className="grid grid-cols-12 gap-4 px-4 py-2 text-sm font-medium text-gray-500 dark:text-gray-400 border-b dark:border-gray-700 mb-2">
-              <div className="col-span-1"></div> {/* Icon column */}
-              <div className="col-span-4">İsim</div>
-              <div className="col-span-2">Tür</div>
-              <div className="col-span-2">Boyut</div>
-              <div className="col-span-2">Değiştirilme</div>
+            <div className="hidden sm:grid grid-cols-12 gap-4 px-4 py-2 text-sm font-medium text-gray-500 dark:text-gray-400 border-b dark:border-gray-700 mb-2">
+              <div className="col-span-5 lg:col-span-5">İsim</div>
+              <div className="col-span-2 lg:col-span-2">Tür</div>
+              <div className="col-span-2 lg:col-span-2">Boyut</div>
+              <div className="col-span-2 lg:col-span-2">Değiştirilme</div>
               <div className="col-span-1"></div> {/* Actions column */}
             </div>
           )}
@@ -737,52 +879,77 @@ const FileManager = () => {
           <div
             className={classNames(
               viewMode === 'grid'
-                ? 'grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-6 xl:grid-cols-8 gap-4'
+                ? 'grid grid-cols-2 xs:grid-cols-3 sm:grid-cols-4 md:grid-cols-5 lg:grid-cols-6 xl:grid-cols-8 2xl:grid-cols-10 gap-3 sm:gap-4'
                 : 'space-y-1',
             )}
           >
-          {filteredItems.length === 0 ? (
-            <div className="col-span-full text-center py-20">
-              <FaFolder className="mx-auto h-16 w-16 text-gray-400 mb-4" />
-              <p className="text-gray-500 dark:text-gray-400">
-                {filters.searchTerm ? 'No files match your search' : 'This folder is empty'}
-              </p>
-            </div>
-          ) : (
-            filteredItems.map((item) => (
-              <FileItem
-                key={item.id}
-                item={item}
-                viewMode={viewMode}
-                selected={selectedItems.includes(item.id)}
-                onSelect={handleItemSelect}
-                onDoubleClick={handleItemDoubleClick}
-                onToggleSelect={handleItemSelect}
-                onCreateFolder={(parentItem) => {
-                  // Klasör içinde yeni klasör oluşturmak için parent klasörü set et
-                  setCurrentFolderId(parentItem.id)
-                  setCreateFolderModalOpen(true)
-                }}
-                onRename={openRenameModal}
-                onMove={(item) => {
-                  // Move işlevi henüz implement edilmedi
-                  toast.push(<Notification type="info">Move özelliği yakında eklenecek</Notification>)
-                }}
-                onDelete={(item) => openDeleteModal([item])}
-                onDownload={item.type === 'file' ? handleDownload : undefined}
-                onPreview={item.type === 'file' ? (item) => {
-                  // Preview işlevi - resimler için modal açabiliriz
-                  if (item.mimeType?.startsWith('image/')) {
-                    // Resim preview modal'ı açılabilir
-                    toast.push(<Notification type="info">Resim önizleme özelliği yakında eklenecek</Notification>)
-                  } else {
-                    // Diğer dosya tipleri için download
-                    handleDownload(item)
+            {filteredItems.length === 0 ? (
+              <div className="col-span-full text-center py-12 sm:py-20">
+                <FaFolder className="mx-auto h-12 w-12 sm:h-16 sm:w-16 text-gray-400 mb-4" />
+                <p className="text-gray-500 dark:text-gray-400 text-sm sm:text-base px-4">
+                  {filters.searchTerm ? 'No files match your search' : 'This folder is empty'}
+                </p>
+              </div>
+            ) : (
+              filteredItems.map((item) => (
+                <FileItem
+                  key={item.id}
+                  item={item}
+                  viewMode={viewMode}
+                  selected={selectedItems.includes(item.id)}
+                  onSelect={handleItemSelect}
+                  onDoubleClick={handleItemDoubleClick}
+                  onToggleSelect={handleItemSelect}
+                  onCreateFolder={(parentItem) => {
+                    // Klasör içinde yeni klasör oluşturmak için parent klasörü set et
+                    setCurrentFolderId(parentItem.id)
+                    setCreateFolderModalOpen(true)
+                  }}
+                  onRename={openRenameModal}
+                  onMove={(item) => {
+                    // Move işlemi için öğeyi cut olarak clipboard'a koy
+                    cutSelectedItems()
+                    if (!selectedItems.includes(item.id)) {
+                      setSelectedItems([item.id])
+                      localStorage.setItem(
+                        'fileManager_clipboard',
+                        JSON.stringify({
+                          operation: 'cut',
+                          items: [item],
+                          sourceFolder: currentFolderId,
+                        }),
+                      )
+                      setHasClipboardData(true)
+                      toast.push(
+                        <Notification title="Cut" type="success">
+                          Item ready to move. Navigate to target folder and paste.
+                        </Notification>,
+                      )
+                    }
+                  }}
+                  onDelete={(item) => openDeleteModal([item])}
+                  onDownload={item.type === 'file' ? handleDownload : undefined}
+                  onPreview={
+                    item.type === 'file'
+                      ? (item) => {
+                          // Preview işlevi - resimler için modal açabiliriz
+                          if (item.mimeType?.startsWith('image/')) {
+                            // Resim preview modal'ı açılabilir
+                            toast.push(
+                              <Notification type="info">
+                                Resim önizleme özelliği yakında eklenecek
+                              </Notification>,
+                            )
+                          } else {
+                            // Diğer dosya tipleri için download
+                            handleDownload(item)
+                          }
+                        }
+                      : undefined
                   }
-                } : undefined}
-              />
-            ))
-          )}
+                />
+              ))
+            )}
           </div>
         </>
       )}
diff --git a/ui/src/views/admin/files/components/FileItem.tsx b/ui/src/views/admin/files/components/FileItem.tsx
index 231dc2ac..64e9fcd1 100644
--- a/ui/src/views/admin/files/components/FileItem.tsx
+++ b/ui/src/views/admin/files/components/FileItem.tsx
@@ -23,7 +23,7 @@ export interface FileItemProps {
   selected?: boolean
   viewMode?: 'grid' | 'list'
   onSelect?: (item: FileItemType) => void
-  onDoubleClick?: (item: FileItemType) => void
+  onDoubleClick?: (item: FileItemType, event?: React.MouseEvent) => void
   onCreateFolder?: (parentItem: FileItemType) => void
   onRename?: (item: FileItemType) => void
   onMove?: (item: FileItemType) => void
@@ -35,10 +35,14 @@ export interface FileItemProps {
 }
 
 const getFileIcon = (item: FileItemType, large: boolean = false) => {
-  const iconSize = large ? "h-12 w-12" : "h-8 w-8"
-  
+  const iconSize = large ? 'h-12 w-12' : 'h-8 w-8'
+
   if (item.type === 'folder') {
-    return <HiFolder className={`${iconSize} text-blue-500`} />
+    if (item.isReadOnly) {
+      return <HiFolder className={`${iconSize} text-gray-500`} />
+    } else {
+      return <HiFolder className={`${iconSize} text-blue-500`} />
+    }
   }
 
   const extension = item.extension?.toLowerCase()
@@ -75,7 +79,7 @@ const formatFileSize = (bytes?: number): string => {
 
 const formatDate = (date?: string | Date): string => {
   if (!date) return ''
-  
+
   try {
     const dateObj = typeof date === 'string' ? new Date(date) : date
     return dateObj.toLocaleDateString('tr-TR', {
@@ -83,7 +87,7 @@ const formatDate = (date?: string | Date): string => {
       month: 'short',
       day: 'numeric',
       hour: '2-digit',
-      minute: '2-digit'
+      minute: '2-digit',
     })
   } catch {
     return ''
@@ -92,10 +96,10 @@ const formatDate = (date?: string | Date): string => {
 
 const getFileTypeLabel = (item: FileItemType): string => {
   if (item.type === 'folder') return 'Klasör'
-  
+
   const extension = item.extension?.toLowerCase()
   const mimeType = item.mimeType?.toLowerCase()
-  
+
   if (mimeType?.startsWith('image/')) return 'Resim'
   if (mimeType?.startsWith('video/')) return 'Video'
   if (mimeType?.startsWith('audio/')) return 'Ses'
@@ -106,7 +110,7 @@ const getFileTypeLabel = (item: FileItemType): string => {
   if (['zip', 'rar', '7z', 'tar', 'gz'].includes(extension || '')) return 'Arşiv'
   if (['txt', 'md'].includes(extension || '')) return 'Metin'
   if (['json', 'xml', 'css', 'js', 'ts', 'html'].includes(extension || '')) return 'Kod'
-  
+
   return extension?.toUpperCase() || 'Dosya'
 }
 
@@ -133,8 +137,8 @@ const FileItem = forwardRef<HTMLDivElement, FileItemProps>((props, ref) => {
     onSelect?.(item)
   }
 
-  const handleDoubleClick = () => {
-    onDoubleClick?.(item)
+  const handleDoubleClick = (e: React.MouseEvent) => {
+    onDoubleClick?.(item, e)
   }
 
   const handleCheckboxChange = (e: React.ChangeEvent<HTMLInputElement>) => {
@@ -216,8 +220,6 @@ const FileItem = forwardRef<HTMLDivElement, FileItemProps>((props, ref) => {
       : []),
   ]
 
-
-
   const dropdownList = (
     <div className="py-1 min-w-36">
       {actionMenuItems.map((menuItem) => (
@@ -225,16 +227,21 @@ const FileItem = forwardRef<HTMLDivElement, FileItemProps>((props, ref) => {
           key={menuItem.key}
           className={classNames(
             'flex items-center px-2 py-1 text-xs cursor-pointer hover:bg-gray-100 dark:hover:bg-gray-700 transition-colors',
-            menuItem.dangerous && 'text-red-600 dark:text-red-400 hover:bg-red-50 dark:hover:bg-red-900/20',
+            menuItem.dangerous &&
+              'text-red-600 dark:text-red-400 hover:bg-red-50 dark:hover:bg-red-900/20',
           )}
           onClick={() => {
             menuItem.onClick()
             setDropdownOpen(false)
           }}
         >
-          {menuItem.icon === 'HiFolderPlus' && <HiFolderPlus className="h-4 w-4 mr-3 text-blue-500" />}
+          {menuItem.icon === 'HiFolderPlus' && (
+            <HiFolderPlus className="h-4 w-4 mr-3 text-blue-500" />
+          )}
           {menuItem.icon === 'HiEye' && <HiEye className="h-4 w-4 mr-3 text-gray-500" />}
-          {menuItem.icon === 'HiArrowDownTray' && <HiArrowDownTray className="h-4 w-4 mr-3 text-green-500" />}
+          {menuItem.icon === 'HiArrowDownTray' && (
+            <HiArrowDownTray className="h-4 w-4 mr-3 text-green-500" />
+          )}
           {menuItem.icon === 'HiPencil' && <HiPencil className="h-4 w-4 mr-3 text-orange-500" />}
           {menuItem.icon === 'HiArrowRightOnRectangle' && (
             <HiArrowRightOnRectangle className="h-4 w-4 mr-3 text-purple-500" />
@@ -249,12 +256,12 @@ const FileItem = forwardRef<HTMLDivElement, FileItemProps>((props, ref) => {
   // Resim preview komponenti
   const ImagePreview = ({ src, alt }: { src: string; alt: string }) => {
     const [imageError, setImageError] = useState(false)
-    
+
     return (
       <div className="w-full h-full bg-gray-100 dark:bg-gray-700 rounded flex items-center justify-center overflow-hidden">
         {!imageError ? (
-          <img 
-            src={src} 
+          <img
+            src={src}
             alt={alt}
             className="max-w-full max-h-full object-cover"
             onError={() => setImageError(true)}
@@ -273,7 +280,7 @@ const FileItem = forwardRef<HTMLDivElement, FileItemProps>((props, ref) => {
       <div
         ref={ref}
         className={classNames(
-          'relative group grid grid-cols-12 gap-4 p-3 border rounded-lg cursor-pointer transition-all duration-200',
+          'relative group grid grid-cols-12 gap-4 p-2 border rounded-lg cursor-pointer transition-all duration-200 select-none',
           'hover:border-blue-300 hover:bg-gray-50 dark:hover:bg-gray-700/50',
           selected
             ? 'border-blue-500 bg-blue-50 dark:bg-blue-900/20'
@@ -283,52 +290,56 @@ const FileItem = forwardRef<HTMLDivElement, FileItemProps>((props, ref) => {
         onClick={handleClick}
         onDoubleClick={handleDoubleClick}
       >
-        {/* Checkbox */}
-        <div className="col-span-1 flex items-center">
-          <input
-            type="checkbox"
-            checked={selected}
-            onChange={handleCheckboxChange}
-            onClick={handleCheckboxClick}
-            disabled={item.isReadOnly}
-            className="w-4 h-4 text-blue-600 bg-gray-100 border-gray-300 rounded focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600 disabled:opacity-50 disabled:cursor-not-allowed"
-          />
-        </div>
+        {/* File Name */}
+        <div className="col-span-5 flex items-center min-w-0 gap-2">
+          {/* Checkbox */}
+          {!item.isReadOnly ? (
+            <input
+              type="checkbox"
+              checked={selected}
+              onChange={handleCheckboxChange}
+              onClick={handleCheckboxClick}
+              className="w-4 h-4 text-blue-600 bg-gray-100 border-gray-300 rounded focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600"
+            />
+          ) : (
+            <div className="w-4 h-4" /> // Boş alan bırak
+          )}
 
-        {/* File Icon or Preview */}
-        <div className="col-span-1 flex items-center">
+          {/* File Icon or Preview */}
           <div className="w-8 h-8">
             {item.type === 'file' && item.mimeType?.startsWith('image/') ? (
-              <ImagePreview src={`/api/app/file-management/${item.id}/download-file`} alt={item.name} />
+              <ImagePreview
+                src={`/api/app/file-management/${item.id}/download-file`}
+                alt={item.name}
+              />
             ) : (
               <div className="w-full h-full flex items-center justify-center">
                 {getFileIcon(item, false)}
               </div>
             )}
           </div>
-        </div>
 
-        {/* File Name */}
-        <div className="col-span-3 flex items-center min-w-0 gap-2">
-          <p className="text-sm font-medium text-gray-900 dark:text-gray-100 truncate">
+          <p
+            className="text-sm font-semibold text-gray-900 dark:text-gray-100 truncate cursor-pointer hover:text-blue-600 dark:hover:text-blue-400 transition-colors"
+            title={item.name}
+          >
             {item.name}
           </p>
           {item.isReadOnly && (
             <span className="inline-flex items-center px-1.5 py-0.5 rounded-full text-xs font-medium bg-orange-100 text-orange-800 dark:bg-orange-900/30 dark:text-orange-300 flex-shrink-0">
-              Protected
+              <span className="hidden sm:inline">Protected</span>
+              <span className="sm:hidden">!</span>
             </span>
           )}
         </div>
 
-        {/* File Type */}
-        <div className="col-span-2 flex items-center">
-          <span className="text-sm text-gray-500 dark:text-gray-400">
-            {getFileTypeLabel(item)}
-          </span>
+        {/* File Type - Hidden on mobile */}
+        <div className="hidden sm:flex col-span-2 items-center">
+          <span className="text-sm text-gray-500 dark:text-gray-400">{getFileTypeLabel(item)}</span>
         </div>
 
         {/* File Size */}
-        <div className="col-span-2 flex items-center">
+        <div className="col-span-2 sm:col-span-2 flex items-center">
           {item.type === 'file' && item.size ? (
             <span className="text-sm text-gray-500 dark:text-gray-400">
               {formatFileSize(item.size)}
@@ -338,40 +349,15 @@ const FileItem = forwardRef<HTMLDivElement, FileItemProps>((props, ref) => {
           )}
         </div>
 
-        {/* Modified Date */}
-        <div className="col-span-2 flex items-center">
+        {/* Modified Date - Hidden on mobile */}
+        <div className="hidden sm:flex col-span-2 items-center">
           <span className="text-sm text-gray-500 dark:text-gray-400">
             {formatDate(item.modifiedAt)}
           </span>
         </div>
-        
-        {/* Action Menu */}
-        <div className="col-span-1 flex items-center justify-end opacity-0 group-hover:opacity-100 transition-opacity relative">
-          {!item.isReadOnly && (
-            <>
-              <button
-                className="p-1 rounded hover:bg-gray-200 dark:hover:bg-gray-600"
-                onClick={(e) => {
-                  e.stopPropagation()
-                  setDropdownOpen(!dropdownOpen)
-                }}
-              >
-                <HiEllipsisVertical className="h-4 w-4" />
-              </button>
-              
-              {dropdownOpen && actionMenuItems.length > 0 && (
-                <>
-                  <div 
-                    className="fixed inset-0 z-10" 
-                    onClick={() => setDropdownOpen(false)}
-                  />
-                  <div className="absolute right-0 top-full mt-1 z-20 bg-white dark:bg-gray-800 rounded-md shadow-lg border dark:border-gray-600">
-                    {dropdownList}
-                  </div>
-                </>
-              )}
-            </>
-          )}
+
+        {/* Action Menu - Removed */}
+        <div className="col-span-1 sm:col-span-1 flex items-center justify-end">
         </div>
       </div>
     )
@@ -382,7 +368,7 @@ const FileItem = forwardRef<HTMLDivElement, FileItemProps>((props, ref) => {
     <div
       ref={ref}
       className={classNames(
-        'relative group p-4 border rounded-xl cursor-pointer transition-all duration-300',
+        'relative group p-4 border rounded-xl cursor-pointer transition-all duration-300 select-none',
         'hover:border-blue-400 hover:shadow-lg hover:-translate-y-1',
         selected
           ? 'border-blue-500 bg-blue-50 dark:bg-blue-900/20 shadow-lg'
@@ -393,76 +379,49 @@ const FileItem = forwardRef<HTMLDivElement, FileItemProps>((props, ref) => {
       onDoubleClick={handleDoubleClick}
     >
       {/* Checkbox */}
-      <div className="absolute top-3 left-3 z-10">
-        <input
-          type="checkbox"
-          checked={selected}
-          onChange={handleCheckboxChange}
-          onClick={handleCheckboxClick}
-          disabled={item.isReadOnly}
-          className="w-4 h-4 text-blue-600 bg-white border-gray-300 rounded focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600 shadow-sm disabled:opacity-50 disabled:cursor-not-allowed"
-        />
-      </div>
-
-      {/* Action Menu */}
       {!item.isReadOnly && (
-        <div className="absolute top-3 right-3 opacity-0 group-hover:opacity-100 transition-all duration-200">
-          <button
-            className="p-1.5 rounded-full bg-white dark:bg-gray-700 shadow-md hover:shadow-lg hover:bg-gray-50 dark:hover:bg-gray-600 transition-all duration-200"
-            onClick={(e) => {
-              e.stopPropagation()
-              setDropdownOpen(!dropdownOpen)
-            }}
-          >
-            <HiEllipsisVertical className="h-4 w-4 text-gray-600 dark:text-gray-300" />
-          </button>
-          
-          {dropdownOpen && actionMenuItems.length > 0 && (
-            <>
-              <div 
-                className="fixed inset-0 z-10" 
-                onClick={() => setDropdownOpen(false)}
-              />
-              <div className="absolute right-0 top-full mt-2 z-20 bg-white dark:bg-gray-800 rounded-md shadow-lg border dark:border-gray-600">
-                {dropdownList}
-              </div>
-            </>
-          )}
+        <div className="absolute top-3 left-3 z-10">
+          <input
+            type="checkbox"
+            checked={selected}
+            onChange={handleCheckboxChange}
+            onClick={handleCheckboxClick}
+            className="w-4 h-4 text-blue-600 bg-white border-gray-300 rounded focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600 shadow-sm"
+          />
         </div>
       )}
 
+
+
       {/* File/Folder Icon or Preview */}
       <div className="flex justify-center mb-3">
         {item.type === 'file' && item.mimeType?.startsWith('image/') ? (
           <div className="w-16 h-16">
-            <ImagePreview src={`/api/app/file-management/${item.id}/download-file`} alt={item.name} />
+            <ImagePreview
+              src={`/api/app/file-management/${item.id}/download-file`}
+              alt={item.name}
+            />
           </div>
         ) : (
-          <div className="flex justify-center">
-            {getFileIcon(item, true)}
-          </div>
+          <div className="flex justify-center">{getFileIcon(item, true)}</div>
         )}
       </div>
 
       {/* File/Folder Name and Details */}
       <div className="text-center">
         <div className="flex items-center justify-center gap-1 mb-1">
-          <p className="text-sm font-medium text-gray-900 dark:text-gray-100 truncate">
+          <p
+            className="text-sm font-semibold text-gray-900 dark:text-gray-100 truncate cursor-pointer hover:text-blue-600 dark:hover:text-blue-400 transition-colors px-2"
+            title={item.name}
+          >
             {item.name}
           </p>
-          {item.isReadOnly && (
-            <span className="inline-flex items-center px-1.5 py-0.5 rounded-full text-xs font-medium bg-orange-100 text-orange-800 dark:bg-orange-900/30 dark:text-orange-300">
-              Protected
-            </span>
-          )}
         </div>
 
         {/* File Size and Type */}
         {item.type === 'file' && (
           <div className="space-y-1">
-            <p className="text-xs text-gray-500 dark:text-gray-400">
-              {getFileTypeLabel(item)}
-            </p>
+            <p className="text-xs text-gray-500 dark:text-gray-400">{getFileTypeLabel(item)}</p>
             {item.size && (
               <p className="text-xs text-gray-500 dark:text-gray-400">
                 {formatFileSize(item.size)}
diff --git a/ui/src/views/admin/files/components/FileModals.tsx b/ui/src/views/admin/files/components/FileModals.tsx
index 50f74e1a..41d2f6f7 100644
--- a/ui/src/views/admin/files/components/FileModals.tsx
+++ b/ui/src/views/admin/files/components/FileModals.tsx
@@ -201,10 +201,9 @@ export const DeleteConfirmModal = forwardRef<HTMLDivElement, DeleteConfirmModalP
 
     return (
       <Dialog isOpen={isOpen} onClose={onClose}>
-        <div ref={ref} className="max-w-md">
+        <div ref={ref}>
           <div className="flex items-center justify-between pb-4 border-b">
             <h3 className="text-lg font-semibold text-red-600">Delete Items</h3>
-            <Button variant="plain" size="sm" icon={<HiXMark />} onClick={onClose} />
           </div>
 
           <div className="py-6">
@@ -212,7 +211,7 @@ export const DeleteConfirmModal = forwardRef<HTMLDivElement, DeleteConfirmModalP
               Are you sure you want to delete the following items? This action cannot be undone.
             </p>
 
-            <div className="bg-gray-50 dark:bg-gray-700 rounded-lg p-4">
+            <div className="bg-gray-50 dark:bg-gray-700 rounded-lg p-2">
               {folderCount > 0 && (
                 <p className="text-sm text-gray-700 dark:text-gray-300">
                   {folderCount} folder{folderCount > 1 ? 's' : ''}
diff --git a/ui/src/views/admin/files/components/FileUploadModal.tsx b/ui/src/views/admin/files/components/FileUploadModal.tsx
index 13f87a5a..8bbd6858 100644
--- a/ui/src/views/admin/files/components/FileUploadModal.tsx
+++ b/ui/src/views/admin/files/components/FileUploadModal.tsx
@@ -12,11 +12,13 @@ export interface FileUploadModalProps {
   className?: string
 }
 
-interface UploadFileWithProgress extends File {
+interface UploadFileWithProgress {
   id: string
+  file: File
   progress: number
   status: 'pending' | 'uploading' | 'completed' | 'error'
   error?: string
+  errorDetail?: string
 }
 
 const FileUploadModal = forwardRef<HTMLDivElement, FileUploadModalProps>((props, ref) => {
@@ -31,7 +33,9 @@ const FileUploadModal = forwardRef<HTMLDivElement, FileUploadModalProps>((props,
 
   const formatFileSize = (bytes: number): string => {
     const sizes = ['B', 'KB', 'MB', 'GB', 'TB']
-    if (bytes === 0) return '0 B'
+
+    // Handle undefined, null, NaN values
+    if (!bytes || bytes === 0 || isNaN(bytes)) return '0 B'
 
     const i = Math.floor(Math.log(bytes) / Math.log(1024))
     return Math.round((bytes / Math.pow(1024, i)) * 100) / 100 + ' ' + sizes[i]
@@ -40,8 +44,8 @@ const FileUploadModal = forwardRef<HTMLDivElement, FileUploadModalProps>((props,
   const handleFilesSelect = useCallback((files: FileList | File[]) => {
     const fileArray = Array.from(files)
     const newFiles: UploadFileWithProgress[] = fileArray.map((file) => ({
-      ...file,
       id: generateFileId(),
+      file: file,
       progress: 0,
       status: 'pending' as const,
     }))
@@ -87,41 +91,121 @@ const FileUploadModal = forwardRef<HTMLDivElement, FileUploadModalProps>((props,
     setUploading(true)
     const filesToUpload = uploadFiles.filter((f) => f.status === 'pending')
 
-    try {
-      // Simulate upload progress for demo - replace with actual upload logic
-      for (const file of filesToUpload) {
+    // Upload files one by one
+    for (const fileData of filesToUpload) {
+      let progressInterval: NodeJS.Timeout | null = null
+      
+      try {
+        // Set status to uploading
         setUploadFiles((prev) =>
-          prev.map((f) => (f.id === file.id ? { ...f, status: 'uploading' as const } : f)),
+          prev.map((f) => (f.id === fileData.id ? { ...f, status: 'uploading' as const } : f)),
         )
 
-        // Simulate progress
-        for (let progress = 0; progress <= 100; progress += 10) {
-          await new Promise((resolve) => setTimeout(resolve, 100))
-          setUploadFiles((prev) => prev.map((f) => (f.id === file.id ? { ...f, progress } : f)))
+        // Simulate progress for visual feedback
+        progressInterval = setInterval(() => {
+          setUploadFiles((prev) =>
+            prev.map((f) => {
+              if (f.id === fileData.id && f.progress < 90) {
+                return { ...f, progress: f.progress + 10 }
+              }
+              return f
+            }),
+          )
+        }, 100)
+
+        // Call the actual upload function for single file
+        await onUpload([fileData.file])
+
+        // Clear progress interval
+        if (progressInterval) {
+          clearInterval(progressInterval)
+          progressInterval = null
         }
 
+        // Mark as completed and remove from list after delay
         setUploadFiles((prev) =>
-          prev.map((f) => (f.id === file.id ? { ...f, status: 'completed' as const } : f)),
+          prev.map((f) =>
+            f.id === fileData.id ? { ...f, status: 'completed' as const, progress: 100 } : f,
+          ),
+        )
+
+        // Remove completed files from list after 2 seconds
+        setTimeout(() => {
+          setUploadFiles((prev) => prev.filter((f) => f.id !== fileData.id))
+        }, 2000)
+      } catch (error: any) {
+        console.error('Upload failed for file:', fileData.file.name, error)
+
+        // Clear progress interval in case of error
+        if (progressInterval) {
+          clearInterval(progressInterval)
+          progressInterval = null
+        }
+
+        // Extract detailed error message from ABP response
+        let errorMessage = 'Upload failed'
+        let detailMessage = ''
+
+        if (error?.response?.data?.error) {
+          const errorData = error.response.data.error
+          
+          // Ana hata mesajı
+          if (errorData.message) {
+            errorMessage = errorData.message
+          }
+          
+          // Detay mesajı - validationErrors veya details'den
+          if (errorData.details) {
+            detailMessage = errorData.details
+          } else if (errorData.validationErrors && errorData.validationErrors.length > 0) {
+            detailMessage = errorData.validationErrors[0].message || errorData.validationErrors[0]
+          }
+
+          // Dosya boyutu kontrolü için özel mesaj
+          if (detailMessage.includes('Request body too large') || detailMessage.includes('max request body size')) {
+            const maxSizeMB = 30 // 30MB limit
+            errorMessage = 'File too large'
+            detailMessage = `File size exceeds the maximum allowed size of ${maxSizeMB}MB. Your file is ${(fileData.file.size / (1024 * 1024)).toFixed(1)}MB.`
+          }
+
+        } else if (error?.message) {
+          errorMessage = error.message
+        } else if (typeof error === 'string') {
+          errorMessage = error
+        }
+
+        // Mark as error with detailed message
+        setUploadFiles((prev) =>
+          prev.map((f) =>
+            f.id === fileData.id
+              ? {
+                  ...f,
+                  status: 'error' as const,
+                  error: errorMessage,
+                  errorDetail: detailMessage,
+                  progress: 0,
+                }
+              : f,
+          ),
         )
       }
+    }
 
-      // Call the actual upload function
-      await onUpload(filesToUpload)
+    setUploading(false)
 
-      // Close modal after successful upload
-      setTimeout(() => {
-        onClose()
-        setUploadFiles([])
-      }, 1000)
-    } catch (error) {
-      console.error('Upload failed:', error)
-      setUploadFiles((prev) =>
-        prev.map((f) =>
-          f.status === 'uploading' ? { ...f, status: 'error' as const, error: 'Upload failed' } : f,
-        ),
-      )
-    } finally {
-      setUploading(false)
+    // Check if all files are processed (completed or error)
+    const remainingFiles = uploadFiles.filter(
+      (f) => f.status === 'pending' || f.status === 'uploading',
+    )
+    if (remainingFiles.length === 0) {
+      // If no pending files and no errors, close modal
+      const hasErrors = uploadFiles.some((f) => f.status === 'error')
+      if (!hasErrors) {
+        setTimeout(() => {
+          onClose()
+          setUploadFiles([])
+        }, 2000)
+      }
     }
   }
 
@@ -132,22 +216,31 @@ const FileUploadModal = forwardRef<HTMLDivElement, FileUploadModalProps>((props,
     }
   }
 
+  const clearCompletedFiles = () => {
+    setUploadFiles((prev) => prev.filter((f) => f.status !== 'completed'))
+  }
+
+  const clearErrorFiles = () => {
+    setUploadFiles((prev) => prev.filter((f) => f.status !== 'error'))
+  }
+
   const totalFiles = uploadFiles.length
   const completedFiles = uploadFiles.filter((f) => f.status === 'completed').length
-  const hasError = uploadFiles.some((f) => f.status === 'error')
+  const errorFiles = uploadFiles.filter((f) => f.status === 'error').length
+  const pendingFiles = uploadFiles.filter((f) => f.status === 'pending').length
+  const hasError = errorFiles > 0
 
   return (
     <Dialog isOpen={isOpen} onClose={handleClose} className={className}>
       <div ref={ref}>
-        <div className="flex items-center justify-between pb-4 border-b">
+        <div className="flex items-center justify-between pb-2 border-b">
           <h3 className="text-lg font-semibold">Upload Files</h3>
         </div>
 
-        <div className="py-6">
-          {/* Upload Area */}
+        <div className="py-2">
           <div
             className={classNames(
-              'relative border-2 border-dashed rounded-lg p-8 text-center transition-colors',
+              'relative border-2 border-dashed rounded-lg p-4 text-center transition-colors',
               isDragOver
                 ? 'border-blue-400 bg-blue-50 dark:bg-blue-900/20'
                 : 'border-gray-300 dark:border-gray-600 hover:border-gray-400',
@@ -172,67 +265,66 @@ const FileUploadModal = forwardRef<HTMLDivElement, FileUploadModalProps>((props,
             <p className="text-sm text-gray-500 dark:text-gray-400 mb-4">
               Select one or more files to upload
             </p>
-            <Button
-              variant="solid"
-              onClick={() => fileInputRef.current?.click()}
-              disabled={uploading}
-            >
-              Select Files
-            </Button>
           </div>
 
           {/* File List */}
           {uploadFiles.length > 0 && (
-            <div className="mt-6">
-              <h4 className="text-sm font-medium text-gray-900 dark:text-gray-100 mb-3">
-                Files to upload ({totalFiles})
-              </h4>
-              <div className="space-y-2 max-h-60 overflow-y-auto">
-                {uploadFiles.map((file) => (
-                  <div
-                    key={file.id}
-                    className="flex items-center justify-between p-3 bg-gray-50 dark:bg-gray-700 rounded-lg"
-                  >
-                    <div className="flex-1 min-w-0">
-                      <p className="text-sm font-medium text-gray-900 dark:text-gray-100 truncate">
-                        {file.name}
+            <div className="space-y-1 max-h-80 overflow-y-auto">
+              {uploadFiles.map((file) => (
+                <div
+                  key={file.id}
+                  className="flex items-center justify-between p-2 bg-gray-50 dark:bg-gray-700 rounded-lg"
+                >
+                  <div className="flex-1 min-w-0">
+                    {/* File name and size in one line */}
+                    <div className="flex items-center justify-between">
+                      <p className="text-sm font-medium text-gray-900 dark:text-gray-100 truncate flex-1 mr-2">
+                        {file.file.name}
                       </p>
-                      <p className="text-xs text-gray-500 dark:text-gray-400">
-                        {formatFileSize(file.size)}
-                      </p>
-
-                      {/* Progress Bar */}
-                      {file.status === 'uploading' && (
-                        <div className="mt-2">
-                          <Progress percent={file.progress} size="sm" />
-                        </div>
-                      )}
-
-                      {/* Status Messages */}
-                      {file.status === 'completed' && (
-                        <p className="text-xs text-green-600 dark:text-green-400 mt-1">
-                          Upload completed
-                        </p>
-                      )}
-                      {file.status === 'error' && (
-                        <p className="text-xs text-red-600 dark:text-red-400 mt-1">
-                          {file.error || 'Upload failed'}
-                        </p>
-                      )}
+                      <span className="text-xs text-gray-500 dark:text-gray-400 flex-shrink-0">
+                        {formatFileSize(file.file.size)}
+                      </span>
                     </div>
 
-                    {file.status === 'pending' && (
-                      <Button
-                        variant="plain"
-                        size="xs"
-                        icon={<HiXMark />}
-                        onClick={() => removeFile(file.id)}
-                        disabled={uploading}
-                      />
+                    {/* Progress Bar */}
+                    {file.status === 'uploading' && (
+                      <div className="mt-1">
+                        <Progress percent={file.progress} size="sm" />
+                      </div>
+                    )}
+
+                    {/* Status Messages */}
+                    {file.status === 'completed' && (
+                      <p className="text-xs text-green-600 dark:text-green-400 mt-1">
+                        ✓ Upload completed
+                      </p>
+                    )}
+                    {file.status === 'error' && (
+                      <div className="mt-1">
+                        <p className="text-xs text-red-600 dark:text-red-400 font-medium">
+                          ✗ {file.error || 'Upload failed'}
+                        </p>
+                        {file.errorDetail && (
+                          <p className="text-xs text-red-500 dark:text-red-400 mt-0.5 leading-relaxed">
+                            {file.errorDetail}
+                          </p>
+                        )}
+                      </div>
                     )}
                   </div>
-                ))}
-              </div>
+
+                  {(file.status === 'pending' || file.status === 'error') && (
+                    <Button
+                      variant="plain"
+                      size="xs"
+                      icon={<HiXMark />}
+                      onClick={() => removeFile(file.id)}
+                      disabled={uploading}
+                      className="ml-2 flex-shrink-0"
+                    />
+                  )}
+                </div>
+              ))}
             </div>
           )}
         </div>
@@ -242,26 +334,37 @@ const FileUploadModal = forwardRef<HTMLDivElement, FileUploadModalProps>((props,
           <div className="text-sm text-gray-500 dark:text-gray-400">
             {uploading && (
               <span>
-                Uploading {completedFiles}/{totalFiles} files...
+                Uploading files... {completedFiles > 0 && `(${completedFiles} completed)`}
               </span>
             )}
-            {!uploading && completedFiles > 0 && !hasError && (
-              <span className="text-green-600">All files uploaded successfully!</span>
+            {!uploading && !hasError && pendingFiles > 0 && (
+              <span className="text-green-600">Ready to upload {pendingFiles} file(s)</span>
+            )}
+            {!uploading && !hasError && pendingFiles === 0 && totalFiles === 0 && (
+              <span className="text-gray-500">No files selected</span>
             )}
-            {hasError && <span className="text-red-600">Some files failed to upload</span>}
           </div>
 
           <div className="flex space-x-2">
+            {hasError && !uploading && (
+              <Button
+                variant="plain"
+                onClick={clearErrorFiles}
+                className="text-red-600 hover:text-red-700"
+              >
+                Clear Errors
+              </Button>
+            )}
             <Button variant="default" onClick={handleClose} disabled={uploading}>
-              {uploading ? 'Uploading...' : 'Cancel'}
+              {uploading ? 'Uploading...' : 'Close'}
             </Button>
             <Button
               variant="solid"
               onClick={handleUpload}
-              disabled={uploadFiles.length === 0 || uploading || completedFiles === totalFiles}
+              disabled={pendingFiles === 0 || uploading}
               loading={uploading}
             >
-              Upload Files
+              {uploading ? 'Uploading...' : `Upload ${pendingFiles} File(s)`}
             </Button>
           </div>
         </div>