diff --git a/jupyter_drives/manager.py b/jupyter_drives/manager.py
index 383020c..9cb3df0 100644
--- a/jupyter_drives/manager.py
+++ b/jupyter_drives/manager.py
@@ -355,7 +355,7 @@ async def save_file(self, drive_name, path, content, options_format, content_for
             if options_format == 'json':
                 formatted_content = json.dumps(content, indent=2)
                 formatted_content = formatted_content.encode("utf-8")
-            elif options_format == 'base64' and (content_format == 'base64' or content_type == 'PDF'):
+            elif options_format == 'base64' and (content_format == 'base64' or content_type == 'PDF' or content_type == 'notebook'):
                 # transform base64 encoding to a UTF-8 byte array for saving or storing
                 byte_characters = base64.b64decode(content)
                 
@@ -371,6 +371,7 @@ async def save_file(self, drive_name, path, content, options_format, content_for
                 formatted_content = content.encode("utf-8")
             else:
                 formatted_content = content
+
             if formatted_content is None or formatted_content == '':
                 formatted_content = b''