I used to use Tarsnap and am still stuck with it in several projects. I wish I weren't. Restoring backups takes ages. If you need to restore a production server in an emergency, and the whole server remains down for an hour because that's how long Tarsnap takes to restore some tens of Gigabytes, then you will very quickly look for alternatives. I raised this issue with Colin, Tarsnap's creator, multiple times. And the answer has always been "maybe some day". I now simply encrypt backups myself and store them in an S3 or Linode bucket. Much faster. For personal backups, I love restic syncing to Backblaze, where I back up 1.4 TB or so for $5 per month.