[6d0debc071]

Well, by reasonable context anything you can't leave lying around for a couple of decades and expect to work, or stick in a reasonably constant environment and expect to be around in a hundred years. HDDs, optical discs - that sort of thing, I'd consider to tend to be fairly fragile.

Anything that wouldn't be accessible to historians in the same sense that photographic stuff is basically.

[wmil]

Color film degrades fairly quickly. It won't last 100 years unless it's constantly climate controlled.