# ``NIOFileSystem`` > Warning: Do not use this module. Instead use [`_NIOFileSystem`][_fs-docs]. > > `NIOFileSystem` currently exposes the same API as `_NIOFileSystem`, which is not API stable. `NIOFileSystem` > was created in error, and its lack of underscore incorrectly implies API stability. Users who are currently importing > `NIOFileSystem` should move to `_NIOFileSystem`. > > Refer to [`_NIOFilesystem`][_fs-docs] for documentation on the API of this module. > > There is ongoing work in NIO to provide a filesystem library with a stable API. [_fs-docs]: ./_NIOFileSystem