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 generally have Operating System backups that are stored on the same drive. Those backups are immediately copied to 3 different devices, my computer and two other drives
The backup on the local drive is useful for when I’m tinkering, making adjustments, adding or removing stuff. Restoring from that local backup is far more convenient than using the remote backups
I don’t use anything with a database so all my static media files and wiki’s don’t go to the local backup. I handle them separately but they are still spread across the 3 other devices in my network