Yes. You can use rclone to backup to an S3 bucket, and then have the S3 bucket set to "instantly" move files to deep archive. To retrieve them, you will need

Yes. You can use rclone to backup to an S3 bucket, and then have the S3 bucket set to "instantly" move files to deep archive. To retrieve them, you will need to run an extra command to "unarchive" them for some period of time. I find this easier than trying to interact directly with any Deep Archive API. It is very cheap, and AWS's durability guarantees are impressive. Main S3 page, linked to a note about Deep Archive https://rclone.org/s3/#glacier-and-glacier-deep-archive https://rclone.org/s3/#glacier-and-glacier-deep-archive The only thing I am not sure on is how to quickly restore a large number of files in a bucket from GDA to S3. It obviously can be scripted, but I don't have that handy. I only keep a small number of large, previously encrypted files in it, so I manually restore from the GUI. (By the way, rclone can transparently encrypt files and filenames client-side!)