All my documents, music, databases, env vars + configuration from both hosts. I specifically don’t back up movies and tv shows because they’re restorable by downloading again.
I don’t have any photos in my stack anywhere. That might be why it’s so low.
Currently a total of 1.37 GB, spread over multiple backups. That’s two host, running among other things home assistant, paperless and *arr stack (though media is not backed up).
Cloudflare has a free tier of 10 GB. I believe BorgBase is the same.
Restic. Nightly backups to local, then Cloudflare R2, then BorgBase. All free.
I probably started early with it. Decided to have it set up from day one. My data might still grow to unfathomable sizes.
What are you using for backup?