downloadUrl
The URL to download the exported asset bundle data from.
This URL is available only after the job has succeeded. This URL is valid for 5 minutes after issuance. Call DescribeAssetBundleExportJob again for a fresh URL if needed.
The downloaded asset bundle is a zip file named assetbundle-{jobId}.qs. The file has a .qs extension.
This URL can't be used in a StartAssetBundleImportJob API call and should only be used for download purposes.