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.
I use nightly backups. I keep them 2 weeks.
After that I keep a weekly backup for 2 months.
After that I keep a monthly backup for 2 years.
I keep my yearly backups forever.