diff --git a/label_studio/core/storage.py b/label_studio/core/storage.py
index 05a6926d1608..c6f099a52ec3 100644
--- a/label_studio/core/storage.py
+++ b/label_studio/core/storage.py
@@ -66,7 +66,10 @@ def url(self, name, storage_url=False, *args, **kwargs):
 
 
 class CustomS3Boto3Storage(StorageProxyMixin, S3Boto3Storage):
-    pass
+    def url(self, name, storage_url=False, *args, **kwargs):
+        if storage_url is True:
+            return super().url(name, *args, **kwargs)
+        return f"s3://{settings.AWS_STORAGE_BUCKET_NAME}/{name}"
 
 
 class CustomAzureStorage(StorageProxyMixin, AzureStorage):
diff --git a/label_studio/data_import/models.py b/label_studio/data_import/models.py
index 8a92bd3ed7ee..8b7dbc626778 100644
--- a/label_studio/data_import/models.py
+++ b/label_studio/data_import/models.py
@@ -113,7 +113,7 @@ def read_task_from_hypertext_body(self):
     def read_task_from_uploaded_file(self):
         logger.debug('Read 1 task from uploaded file {}'.format(self.filepath))
         if settings.CLOUD_FILE_STORAGE_ENABLED:
-            tasks = [{'data': {settings.DATA_UNDEFINED_NAME: self.filepath}}]
+            tasks = [{'data': {settings.DATA_UNDEFINED_NAME: self.file.storage.url(self.file.name)}}]
         else:
             tasks = [{'data': {settings.DATA_UNDEFINED_NAME: self.url}}]
         return tasks