anchor.diff:      case TargetParentCtx =/= undefined of
           true ->
               TargetParentCtx2 = file_ctx:assert_not_readonly_storage(TargetParentCtx),
  -            TargetParentCtx3 = ensure_not_share_file_ctx(TargetParentCtx2),
  +            TargetParentCtx3 = share_to_standard_file_ctx(TargetParentCtx2),
               % we know target parent uuid, so we can create parent directories with correct mode
               % ensure all target parent directories are created
               {ok, _} = mkdir_deferred(TargetParentCtx3, UserCtx);
  
positive.code: -spec create_deferred(file_ctx:ctx(), user_ctx:ctx(), boolean(), boolean()) ->
      {file_location:doc(), file_ctx:ctx()} | {error, cancelled}.
  create_deferred(FileCtx, UserCtx, VerifyDeletionLink, CheckLocationExists) ->
      FileCtx2 = ensure_not_share_file_ctx(FileCtx),
      {#document{
          key = FileLocationId,
          value = #file_location{storage_file_created = StorageFileCreated}
  
negative.code: -spec unlink(file_ctx:ctx(), user_ctx:ctx()) ->
      {ok, file_ctx:ctx()} | {error, term()}.
  unlink(FileCtx, UserCtx) ->
      FileCtx2 = share_to_standard_file_ctx(FileCtx),
      SessId = user_ctx:get_session_id(UserCtx),
      case storage_driver:new_handle(SessId, FileCtx2, false) of
          {undefined, _FileCtx3} ->
  