<Added version="2.8.0"/>
            num_proc (`int`, *optional*, default `None`):
                Number of processes when downloading and generating the dataset locally.
                Multiprocessing is disabled by default.

                <Added version="2.8.0"/>
            storage_options (`dict`, *optional*):
                Key/value pairs to be passed on to the file-system backend, if any.

                <Added version="2.8.0"/>

        Example:

        ```python
        >>> dataset_dict.save_to_disk("path/to/dataset/directory")
        >>> dataset_dict.save_to_disk("path/to/dataset/directory", max_shard_size="1GB")
        >>> dataset_dict.save_to_disk("path/to/dataset/directory", num_shards={"train": 1024, "test": 8})
        ```
        """
        fs: fsspec.AbstractFileSystem
        fs, _ = url_to_fs(dataset_dict_path, **(storage_options or {}))