Family photos/videos and genealogy documents of multiple generations of family makes up the bulk of data I hold dear.

While a scanned copy of something like a birth certificate or deed might not often work in place of a physical copy they're nice to have on hand. Plus they're a part of a family history.

Scans of your birth certificate, passport, house title, car title as starters.

I see. None of those things (in my experiences, no house title ever) have sufficed as a copy. So if you need it and your house burnt down, it's a wait until they're reissued.