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 bormatic, I can go back about 60 days and have needed to a few times in the past due to my own mistakes. Server is in the basement, it backs up toy living room TV pc which is on the top floor. My upload speed is too slow for offsite backups.