Right now I’m creating a nightly restic snapshot of my server on borgbase and on some spare drives, and keeping the snapshots forever. There’s a ton of daily churn in my data though, between databases and logs and other files that don’t constitute ‘real data’ but might be needed to restore the app.
My VPS gets a weekly rsync to my home server. I keep ten deduplicated copies for weeks gone by. The current week also gets synced off-site with encryption.