Comment Re:What are these shiny discs you speak of? (Score 1) 250
This is a phenomenon known as "bitrot." It is for this reason tape drive backups are still around but since SATA allows hotplugging and there are SATA docks now some people just buy hard drives and use those for long term storage. Hard drives as a backup medium I imagine would work pretty good as long as you keep them in a dark, dry and cool place mostly safe from any shock like drops or heavy vibrations. In fact I had a computer from the mid-80's once and its hard drive, file system and data was still intact.
I've always wanted to try tape drives mostly for the novelty but they're excessively expensive which is why I think hard drives as a long term storage medium have started to take off but ultimately I don't think they'll displace tapes for storage meant to last a magnitude of half a century or longer.
I suppose if you're daring enough you could try paper as a backup medium.