def METHOD_NAME(filename: str) -> tuple[str, str, str]:
    """Transforms /some/path/foo.png into ('/some/path', 'foo.png', 'png')."""
    basename = os.path.basename(filename)
    storedir = os.path.dirname(os.path.abspath(filename))
    target = os.path.splitext(filename)[-1][1:]
    return storedir, basename, target