Here is the description of the plan I intend to implement to have a proper backup system. I currently live since too many years on the edge of a disaster, ie the loss of all my data in case of a big event such as house fire, water flooding, etc. I used to backup my data a lot, but each system requires a different software and methods, I have to back up Raspberry Pis’, Windows desktop and laptops, and a Mac. So I have a lot of USB Drive with out of date backups, and they are all on-site. In case of fire, everything will be lost.
This is about to change in the few weeks with my Multi-Tiers Backup Plan.