I use https://github.com/garethgeorge/backrest to manage nightly encrypted backups of my Forgejo instance to a Hetzner Storage Box. <$4/mo for 500GB of storage. It's also where I back up my Immich library to.

Immich automatically dumps its DB every day, for Forgejo I have a little script that runs as part of the Backrest backup that does a pgdumb of the database before doing the backup.

It works great, I even had to do disaster recovery on it once and it went smooth.

I use rclone + backblaze. You get 10GB for free which is more than enough for self-hosted stuff.