Plus restic or borg or similar. I tried natively pushing from truenas for a while and it's just slow and unreliable (particularly when it comes to trying to bus out active datasets) and rsync encryption is janky. Restic is built for this kind of archival task. You'll never get hit with surprise bills for storing billions of small files.

Have Backblaze software stopped being utterly awful, to the point of being almost nonfunctional, yet?