diff --git a/Webshop.Api/Controllers/Admin/FileUploadController.cs b/Webshop.Api/Controllers/Admin/FileUploadController.cs
index 970e942..f1d05d7 100644
--- a/Webshop.Api/Controllers/Admin/FileUploadController.cs
+++ b/Webshop.Api/Controllers/Admin/FileUploadController.cs
@@ -2,10 +2,10 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
-using System.IO;
 using System.Threading.Tasks;
+using Webshop.Application;
 using Webshop.Application.DTOs;
-using Webshop.Domain.Interfaces;
+using Webshop.Application.Services; // Namespace für den neuen Service
 
 namespace Webshop.Api.Controllers.Admin
 {
@@ -14,34 +14,27 @@ namespace Webshop.Api.Controllers.Admin
     [Authorize(Roles = "Admin")]
     public class FileUploadController : ControllerBase
     {
-        private readonly IFileStorageService _fileStorageService;
+        private readonly IFileUploadService _fileUploadService;
 
-        public FileUploadController(IFileStorageService fileStorageService)
+        public FileUploadController(IFileUploadService fileUploadService)
         {
-            _fileStorageService = fileStorageService;
+            _fileUploadService = fileUploadService;
         }
 
         [HttpPost("upload")]
-        public async Task<ActionResult<FileUploadResultDto>> UploadImage(IFormFile file)
+        [ProducesResponseType(typeof(FileUploadResultDto), StatusCodes.Status200OK)]
+        [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status400BadRequest)]
+        [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status500InternalServerError)]
+        public async Task<IActionResult> UploadImage(IFormFile file)
         {
-            if (file == null || file.Length == 0)
+            var result = await _fileUploadService.UploadFileAsync(file);
+
+            return result.Type switch
             {
-                return BadRequest(new { Message = "Es wurde keine Datei hochgeladen." });
-            }
-
-            // Optional: Validierung des Dateityps
-            if (!file.ContentType.StartsWith("image/"))
-            {
-                return BadRequest(new { Message = "Nur Bilddateien sind erlaubt." });
-            }
-
-            // Öffne einen Stream aus der hochgeladenen Datei
-            await using var stream = file.OpenReadStream();
-
-            // Speichere die Datei mit dem Service und erhalte die URL
-            var fileUrl = await _fileStorageService.SaveFileAsync(stream, file.FileName, file.ContentType);
-
-            return Ok(new FileUploadResultDto { Url = fileUrl });
+                ServiceResultType.Success => Ok(result.Value),
+                ServiceResultType.InvalidInput => BadRequest(new { Message = result.ErrorMessage }),
+                _ => StatusCode(StatusCodes.Status500InternalServerError, new { Message = result.ErrorMessage ?? "Ein unerwarteter Fehler ist aufgetreten." })
+            };
         }
     }
 }
\ No newline at end of file
diff --git a/Webshop.Application/Services/FileUploadService.cs b/Webshop.Application/Services/FileUploadService.cs
new file mode 100644
index 0000000..d78728a
--- /dev/null
+++ b/Webshop.Application/Services/FileUploadService.cs
@@ -0,0 +1,46 @@
+// src/Webshop.Application/Services/FileUploadService.cs
+using Microsoft.AspNetCore.Http;
+using System;
+using System.Threading.Tasks;
+using Webshop.Application.DTOs;
+using Webshop.Domain.Interfaces;
+
+namespace Webshop.Application.Services
+{
+    public class FileUploadService : IFileUploadService
+    {
+        private readonly IFileStorageService _fileStorageService;
+
+        public FileUploadService(IFileStorageService fileStorageService)
+        {
+            _fileStorageService = fileStorageService;
+        }
+
+        public async Task<ServiceResult<FileUploadResultDto>> UploadFileAsync(IFormFile file)
+        {
+            if (file == null || file.Length == 0)
+            {
+                return ServiceResult.Fail<FileUploadResultDto>(ServiceResultType.InvalidInput, "Es wurde keine Datei hochgeladen.");
+            }
+
+            if (!file.ContentType.StartsWith("image/"))
+            {
+                return ServiceResult.Fail<FileUploadResultDto>(ServiceResultType.InvalidInput, "Nur Bilddateien sind erlaubt.");
+            }
+
+            try
+            {
+                await using var stream = file.OpenReadStream();
+                var fileUrl = await _fileStorageService.SaveFileAsync(stream, file.FileName, file.ContentType);
+
+                var resultDto = new FileUploadResultDto { Url = fileUrl };
+                return ServiceResult.Ok(resultDto);
+            }
+            catch (Exception ex)
+            {
+                // Hier könntest du den Fehler loggen (z.B. bei Festplattenproblemen)
+                return ServiceResult.Fail<FileUploadResultDto>(ServiceResultType.Failure, $"Beim Speichern der Datei ist ein interner Fehler aufgetreten: {ex.Message}");
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Webshop.Application/Services/IFileUploadService.cs b/Webshop.Application/Services/IFileUploadService.cs
new file mode 100644
index 0000000..441a8f7
--- /dev/null
+++ b/Webshop.Application/Services/IFileUploadService.cs
@@ -0,0 +1,18 @@
+// src/Webshop.Application/Services/IFileUploadService.cs
+using Microsoft.AspNetCore.Http;
+using System.Threading.Tasks;
+using Webshop.Application;
+using Webshop.Application.DTOs;
+
+namespace Webshop.Application.Services
+{
+    public interface IFileUploadService
+    {
+        /// <summary>
+        /// Validiert und speichert eine hochgeladene Datei.
+        /// </summary>
+        /// <param name="file">Die per HTTP-Request hochgeladene Datei.</param>
+        /// <returns>Ein ServiceResult, das bei Erfolg die URL der Datei enthält.</returns>
+        Task<ServiceResult<FileUploadResultDto>> UploadFileAsync(IFormFile file);
+    }
+}
\ No newline at end of file
diff --git a/Webshop.Domain/Interfaces/IFileStorageService.cs b/Webshop.Domain/Interfaces/IFileStorageService.cs
index 16af061..bae5ebc 100644
--- a/Webshop.Domain/Interfaces/IFileStorageService.cs
+++ b/Webshop.Domain/Interfaces/IFileStorageService.cs
@@ -6,13 +6,6 @@ namespace Webshop.Domain.Interfaces
 {
     public interface IFileStorageService
     {
-        /// <summary>
-        /// Speichert eine Datei und gibt die öffentlich zugängliche URL zurück.
-        /// </summary>
-        /// <param name="fileStream">Der Stream der Datei.</param>
-        /// <param name="fileName">Der ursprüngliche Dateiname (zur Ermittlung der Erweiterung).</param>
-        /// <param name="contentType">Der MIME-Typ der Datei.</param>
-        /// <returns>Die öffentliche URL der gespeicherten Datei.</returns>
         Task<string> SaveFileAsync(Stream fileStream, string fileName, string contentType);
     }
 }
\ No newline at end of file