Anyone who is serious about improving their computer backups should read this article by David Sparks aka ‘MacSparky’.
He uses a ‘belt and braces’ approach which guarantees availability of data if the worst happens. I use a similar approach but not as well documented!
Backup 2021 — MacSparky
Backups! The thing that us nerds love to talk about, right? Not really. I talk about backup so much because I often hear the horror stories from listeners and readers that compel me to remind everyone to keep backing up. The good news is that it is easier than ever. So how am I doing it in 2021? B