def METHOD_NAME(export_instance, download_path=None):
    if not download_path:
        export_archive_path = '{}_{}.zip'.format(
            safe_filename(export_instance.name.encode('ascii', 'replace') or 'Export'),
            datetime.utcnow().isoformat()
        )
        download_path = os.path.join(settings.SHARED_DRIVE_ROOT, export_archive_path)
    if not os.path.exists(download_path):
        payload = export_instance.get_payload(stream=True)
        with open(download_path, 'wb') as download:
            shutil.copyfileobj(payload, download)
    return download_path