Slightly different use case. I have a key component that's now 12 years old and was starting to prey on my mind, and Mrs C would NOT be happy if the heating (amongst other stuff) stopped working. I booted a live Linux image from a USB drive, plugged in a secondary SATA drive (was a 2.5" laptop device) and used the dd command (direct disc)
While this will work in many situations to clone other devices (instead of using the internal drive as the source as I did, you simply use another external device), from memory it won't work on the NIT dives because of the obscure file system, unless you have a custom kernel or additional modules.
There are devices that can do all this internally, but, again, I think the obscure FS is problematic.
My comment was more targeted that having a backup process is too late if it's not there before a failure. Eggs 101 and so on.
C