What would you do if your house caught fire? Even “fireproof” safes won’t protect the hard drive for more than a short period.
If my house caught on fire I’m sure I’d have other more pressing issues than my computer backup...
“Well Domandred, sorry your house is a pile of slag and rubble, but at least your computer was backed up!”
I have a 750 gigabyte Toshiba Canvio. It cost a $100 and is the size of a cellphone. So I can take it anywhere without a second thought. I’m not comfortable with storing data in someone elses space.
Offsite backup: safety deposit box one mile away. Big enough for external hard drives. I also have four internal pop-out drives I can rotate there as well.
You don’t have to keep it in your house, keep it off site, use your noggin.