diff --git a/server/reflector/storage/base.py b/server/reflector/storage/base.py
index 7c44ff4d..a457ddf8 100644
--- a/server/reflector/storage/base.py
+++ b/server/reflector/storage/base.py
@@ -18,14 +18,14 @@ class Storage:
         cls._registry[name] = kclass
 
     @classmethod
-    def get_instance(cls, name: str, settings_prefix: str = "", folder: str = ""):
+    def get_instance(cls, name: str, settings_prefix: str = ""):
         if name not in cls._registry:
             module_name = f"reflector.storage.storage_{name}"
             importlib.import_module(module_name)
 
         # gather specific configuration for the processor
         # search `TRANSCRIPT_BACKEND_XXX_YYY`, push to constructor as `backend_xxx_yyy`
-        config = {"folder": folder}
+        config = {}
         name_upper = name.upper()
         config_prefix = f"{settings_prefix}{name_upper}_"
         for key, value in settings:
@@ -35,10 +35,6 @@ class Storage:
 
         return cls._registry[name](**config)
 
-    def __init__(self):
-        self.folder = ""
-        super().__init__()
-
     async def put_file(self, filename: str, data: bytes) -> FileResult:
         return await self._put_file(filename, data)
 
@@ -50,3 +46,9 @@ class Storage:
 
     async def _delete_file(self, filename: str):
         raise NotImplementedError
+
+    async def get_file_url(self, filename: str) -> str:
+        return await self._get_file_url(filename)
+
+    async def _get_file_url(self, filename: str) -> str:
+        raise NotImplementedError
diff --git a/server/reflector/storage/storage_aws.py b/server/reflector/storage/storage_aws.py
index 5ab02903..d2313293 100644
--- a/server/reflector/storage/storage_aws.py
+++ b/server/reflector/storage/storage_aws.py
@@ -22,14 +22,9 @@ class AwsStorage(Storage):
 
         super().__init__()
         self.aws_bucket_name = aws_bucket_name
-        folder = ""
+        self.aws_folder = ""
         if "/" in aws_bucket_name:
-            self.aws_bucket_name, folder = aws_bucket_name.split("/", 1)
-        if folder:
-            if not self.folder:
-                self.folder = folder
-            else:
-                self.folder = f"{self.folder}/{folder}"
+            self.aws_bucket_name, self.aws_folder = aws_bucket_name.split("/", 1)
         self.session = aioboto3.Session(
             aws_access_key_id=aws_access_key_id,
             aws_secret_access_key=aws_secret_access_key,
@@ -39,7 +34,7 @@ class AwsStorage(Storage):
 
     async def _put_file(self, filename: str, data: bytes) -> FileResult:
         bucket = self.aws_bucket_name
-        folder = self.folder
+        folder = self.aws_folder
         logger.info(f"Uploading {filename} to S3 {bucket}/{folder}")
         s3filename = f"{folder}/{filename}" if folder else filename
         async with self.session.client("s3") as client:
@@ -49,9 +44,9 @@ class AwsStorage(Storage):
                 Body=data,
             )
 
-    async def get_file_url(self, filename: str) -> FileResult:
+    async def _get_file_url(self, filename: str) -> FileResult:
         bucket = self.aws_bucket_name
-        folder = self.folder
+        folder = self.aws_folder
         s3filename = f"{folder}/{filename}" if folder else filename
         async with self.session.client("s3") as client:
             presigned_url = await client.generate_presigned_url(
@@ -60,14 +55,11 @@ class AwsStorage(Storage):
                 ExpiresIn=3600,
             )
 
-            return FileResult(
-                filename=filename,
-                url=presigned_url,
-            )
+            return presigned_url
 
     async def _delete_file(self, filename: str):
         bucket = self.aws_bucket_name
-        folder = self.folder
+        folder = self.aws_folder
         logger.info(f"Deleting {filename} from S3 {bucket}/{folder}")
         s3filename = f"{folder}/{filename}" if folder else filename
         async with self.session.client("s3") as client: