Comment puis-je vérifier la quantité de données qu'il me reste ?

Error: Status(StatusCode="InvalidArgument", Detail="Request payload size exceeds the limit: 204800 bytes.", DebugException="Grpc.Core.Internal.CoreErrorDetailException: {"created":"@1753765667.509000000","description":"Error received from peer ipv4:209.85.203.95:443","file":"..\..\..\src\core\lib\surface\call.cc","file_line":953,"grpc_message":"Request payload size exceeds the limit: 204800 bytes.","grpc_status":3}")