Managing a legally procured library of media. Piracy is not the only way to get digital music, movies, and books.

REAR Relax-and-Recover will do entire system point-in-time snapshot backups to a bootable iso or physical USB thumb drive: https://relax-and-recover.org/rear-user-guide/index.html

I use rear for backing up my root, and Borg for packing up user data (for versioning, file recovery), but you can use rear for the entire system too.