diff --git a/app/config/errors.php b/app/config/errors.php
index 8365e8c705..5b21f1099a 100644
--- a/app/config/errors.php
+++ b/app/config/errors.php
@@ -497,6 +497,11 @@ return [
         'description' => 'The requested file is not publicly readable.',
         'code' => 403,
     ],
+    Exception::STORAGE_IMAGE_TRANSFORMATIONS_DISABLED => [
+        'name' => Exception::STORAGE_IMAGE_TRANSFORMATIONS_DISABLED,
+        'description' => 'Image transformations are disabled for this storage bucket.',
+        'code' => 401,
+    ],
 
     /** Tokens */
     Exception::TOKEN_NOT_FOUND => [
diff --git a/app/controllers/api/storage.php b/app/controllers/api/storage.php
index c547679c35..05fd3c2aa1 100644
--- a/app/controllers/api/storage.php
+++ b/app/controllers/api/storage.php
@@ -993,7 +993,7 @@ App::get('/v1/storage/buckets/:bucketId/files/:fileId/preview')
         $allowImageTransformations = $bucket->getAttribute('imageTransformations', true);
         if (!$allowImageTransformations && !$isToken) {
             // Image transformations are disabled for this bucket
-            throw new Exception(Exception::USER_UNAUTHORIZED);
+            throw new Exception(Exception::STORAGE_IMAGE_TRANSFORMATIONS_DISABLED);
         }
 
         if ($fileSecurity && !$valid && !$isToken) {
diff --git a/app/controllers/shared/api.php b/app/controllers/shared/api.php
index f1c974923a..2e250b6cc4 100644
--- a/app/controllers/shared/api.php
+++ b/app/controllers/shared/api.php
@@ -591,7 +591,7 @@ App::init()
                     // Only proceed for preview when not disabled; other routes unaffected
                     // Skip the block for privileged console users and resource tokens.
                     if ($isImageTransformation && $isImageTransformationsBlocked && !$isPrivilegedUser && !$isToken) {
-                        throw new Exception(Exception::USER_UNAUTHORIZED);
+                        throw new Exception(Exception::STORAGE_IMAGE_TRANSFORMATIONS_DISABLED);
                     }
 
                     if ($bucket->isEmpty() || (!$bucket->getAttribute('enabled') && !$isAppUser && !$isPrivilegedUser)) {
diff --git a/src/Appwrite/Extend/Exception.php b/src/Appwrite/Extend/Exception.php
index 3af6d9962c..0173631d27 100644
--- a/src/Appwrite/Extend/Exception.php
+++ b/src/Appwrite/Extend/Exception.php
@@ -148,6 +148,7 @@ class Exception extends \Exception
     public const STORAGE_INVALID_RANGE             = 'storage_invalid_range';
     public const STORAGE_INVALID_APPWRITE_ID       = 'storage_invalid_appwrite_id';
     public const STORAGE_FILE_NOT_PUBLIC           = 'storage_file_not_public';
+    public const STORAGE_IMAGE_TRANSFORMATIONS_DISABLED = 'storage_image_transformations_disabled';
 
     /** VCS */
     public const INSTALLATION_NOT_FOUND            = 'installation_not_found';