I don’t know how many hard drives you have but as a photographer and filmmaker I have over a dozen hard drives, scattered across three computers.
It used to be enough just to pair up some hard drives and move a few files around.
No more. Each computer needs its own backup drive/system.
I’ve just been through cleaning up duplicate backups and freeing up about five drives.
While doing so, I had to come up with some principles of backup, which I will call the backup manifesto. Here they are: