This is something that I might need to invest a few bucks on, as I often wonder what would happen to my computer backups if something happened to the house itself! While I do local backups to a WD Passport drive here at home, use Dropbox for moving smaller files around, and just this week started trying out BackBlaze for full online backups, I think something like this fireproof drive from ioSafe might be a good buy for keeping the important docs here in the house.
How do you backup your data? After years of not doing backups and ignoring the inevitable, I now back up my stuff religiously in as many ways as I can. For a tiny investment and a little time, the security of knowing your stuff is safe is priceless.