Like the outdated minimal capacity spinning hard drives many of us longtime BIAB users have stacked in the closet, the backup approaches suggested by some on this thread seem so totally last century.

There is a better way.

First and foremost ditch any spinning drives. They are dinosaurs. Give them to relatives you hate and sell them on your existing backup stratedgerie.

Cloud Backup and perhaps an additional quarterly local snapshot on some SSD gives you all you really need to feel comfortable. Do it more often if you don't trust the cloud. Big brother is really watching, especially if you've given him reason.
Trust, but verify. And do it on SSD.

If you really have TB's worth of you are far from the average user, even a music user.
In which case you need a real backup system and the BIAB drives are pretty much useless.

More likely you probably have a poorly managed file system with your user data strewn over every application folder on the drive. That is your fault and not really corrected by a bunch of tiny hard drives. Clean that mess up and it all fits nicely on an SSD.

I know many of us (Myself included) are aging tech people but there's no reason we need antiquated hardware coupled with outdated methods to preserve our most precious data.

As always do what you want. For now, Its a free country.

biab2024(Mac) Latest Build
Mac OS Sequoia 15.0.1
Apple M2 pro 32GB Ram
Logic Pro 11