I have two small Sentry safes. Both are the same size physically. One is rated for media, i.e. floppy disks, cassettes, etc. and is much smaller inside as it has an extra layer of fir protection.

When I was a software developer, working from home for 20+ years, I would put my backup copies in the media safe, along with a backup copy in both of our cars. Chances of all three burning down or being stolen were slim.

For the most part now, I keep important documents in a safety deposit box at the bank, stuff is pretty well locked up and they have sprinkler systems.