def _open(self, path, mode="rb", **kwargs):
        path = self._strip_protocol(path)
        sha = self._mapper(path)

        # For read and append, (try) download from remote
        if "r" in mode or "a" in mode:
            fn = self._check_file(path)
            if fn:
                return open(fn, mode)

            fn = os.path.join(self.storage[-1], sha)

            self._mkcache()
            self._cache_size = None

            # append does not require an existing file but read does
            if self.fs.exists(path):
                self.fs.get_file(path, fn)
            elif "r" in mode:
                raise FileNotFoundError(path)

        # just reading does not need special file handling
        if "r" in mode and "+" not in mode:
            return open(fn, mode)

        fn = os.path.join(self.storage[-1], sha)
        user_specified_kwargs = {
            k: v
            for k, v in kwargs.items()
            if k not in ["autocommit", "block_size", "cache_options"]
        }  # those were added by open()
        return LocalTempFile(
            self,
            path,
            mode=mode,
            autocommit=not self._intrans,
            fn=fn,
            **user_specified_kwargs,
        )