diff --git a/naas_python/domains/storage/StorageSchema.py b/naas_python/domains/storage/StorageSchema.py
index 7258fbc..dd8a0f6 100644
--- a/naas_python/domains/storage/StorageSchema.py
+++ b/naas_python/domains/storage/StorageSchema.py
@@ -65,15 +65,13 @@ def post_workspace_storage_object(self,
     def get_workspace_storage_object(self,
         workspace_id: str,
         storage_name: Storage.__fields__['name'],
-        # storage_type: str,
         src_file: str,
         dst_file: str,
     ) -> bytes:
         raise NotImplementedError
     
     @abstractmethod    
-    def create_workspace_storage_credentials(self,
-        # storage_type: str,                                     
+    def create_workspace_storage_credentials(self,                                    
         workspace_id: str,
         storage_name: Storage.__fields__['name'],        
     ) -> None:
@@ -84,7 +82,7 @@ class IStorageDomain(metaclass=ABCMeta):
     adaptor: IStorageAdaptor
     storage_provider_adaptors : List[IStorageProviderAdaptor]
     # storage_provider_adaptors : Map[str, IStorageProviderAdaptor]
-    # to be validated
+    #TODO to be validated
 
     @abstractmethod    
     def create_workspace_storage(self,
@@ -118,7 +116,6 @@ def list_workspace_storage_object(self,
     def delete_workspace_storage_object(self,
         workspace_id: str,
         storage_name: Storage.__fields__['name'],
-        # storage_prefix: Object.__fields__['prefix'],
         object_name: Object.__fields__['name'],
     ) -> None:
         raise NotImplementedError     
@@ -211,4 +208,6 @@ class APIError(NaasException):
 class StorageProviderNotFound(NaasException):
     pass
 class ServiceAuthenticationError(NaasException):
+    pass
+class ServiceStatusError(NaasException):
     pass
\ No newline at end of file
diff --git a/naas_python/domains/storage/adaptors/secondary/providers/S3StorageProviderAdaptor.py b/naas_python/domains/storage/adaptors/secondary/providers/S3StorageProviderAdaptor.py
index 5a152a6..b9be063 100644
--- a/naas_python/domains/storage/adaptors/secondary/providers/S3StorageProviderAdaptor.py
+++ b/naas_python/domains/storage/adaptors/secondary/providers/S3StorageProviderAdaptor.py
@@ -7,6 +7,7 @@
 from logging import getLogger
 from datetime import datetime, timezone
 from urllib.parse import urlparse
+import mimetypes
 
 logger = getLogger(__name__)
 
@@ -19,7 +20,8 @@
     FileNotFoundError,
     BadRequest,
     ForbiddenError,
-    ServiceAuthenticationError    
+    ServiceAuthenticationError,
+    ServiceStatusError
 )
 
 class S3StorageProviderAdaptor(IStorageProviderAdaptor):
@@ -30,7 +32,7 @@ def __init__(self):
         super().__init__()
         self.MAX_RETRY_ATTEMPTS = 1
 
-        self.naas_bucket = os.getenv("NAAS_ENDPOINT_URL") or "api-naas-storage" #TODO create naas-storage with versioning
+        self.naas_bucket = os.getenv("NAAS_ENDPOINT_URL") or "api-naas-storage"
         self.naas_credentials=os.path.expanduser("~/.naas/credentials")
         self.naas_workspace_id=None
         self.naas_workspace_id=None
@@ -51,8 +53,13 @@ def post_workspace_storage_object(self,
         src_file: str,
         dst_file: str,
     ) -> None:
+        
         if dst_file.endswith('/'):
             dst_file = dst_file + os.path.basename(src_file)
+
+        if dst_file == '.':
+            dst_file = os.path.basename(src_file)
+
         key = f"{workspace_id}/{storage_name}/{dst_file}"
         key = self.__clean_path(key)
 
@@ -61,11 +68,13 @@ def post_workspace_storage_object(self,
                 reponse = self.__read_naas_credentials(workspace_id, storage_name)
                 # print("token:", reponse)
             
+            content_type, _ = mimetypes.guess_type(src_file)
+            print("content_type:", content_type)
             s3 = boto3.client('s3')
-            response = s3.upload_file(Filename=src_file, Bucket=self.naas_bucket, Key=key)
+            response = s3.upload_file(Filename=src_file, Bucket=self.naas_bucket, Key=key,  ExtraArgs={'ContentType': content_type})
             # print("end uploading file:",response)
             return response
-        
+
         except Exception as e:
             self.__handle_exceptions(str(e))
 
@@ -76,8 +85,12 @@ def get_workspace_storage_object(self,
         src_file: str, 
         dst_file:str, 
     ) -> bytes :
-        if dst_file.endswith('/') or dst_file.endswith('.'):
+        
+        if dst_file.endswith('/') :
             dst_file = dst_file + os.path.basename(src_file)
+        if dst_file == '.':
+            dst_file = os.path.basename(src_file)
+
         filename=dst_file
         self.__clean_path(filename)
         object_key = workspace_id + "/" + storage_name + "/" + src_file
@@ -242,8 +255,11 @@ def __handle_exceptions(self, exception: str) -> None:
 
         if isinstance(exception, ServiceAuthenticationError):
             raise ServiceAuthenticationError(exception)
-
-        if "An error occurred (ExpiredToken)" in exception and "The provided token has expired." in exception:
+        elif isinstance(exception, ServiceStatusError): #TODO why not catch ?
+            raise ServiceStatusError(exception)
+        elif 'Workspace user' in str(exception) and 'not found' in str(exception):
+            raise ServiceAuthenticationError("Workspace user not found.")
+        elif "An error occurred (ExpiredToken)" in exception and "The provided token has expired." in exception:
                 raise ExpiredToken("The provided token has expired. Please Retry.")            
         elif "An error occurred (400)" in exception and "Bad Request" in exception :
             raise BadRequest(f"Bad request. Please retry in few seconds.")