def store_upload(pub, file_data, file_name, meta_data=None):
    """Create a unique folder for an uploaded file and begin editing it for
    publication.
    """
    upload = new_upload(pub, file_name, meta_data)
    write_file(file_data, upload.file_path)
    upload.status = "Queued for processing"
    upload.save()
    return upload