Buy 5 Hd's....You'll have 5 copies and if you see technology changing, put it on the "new" tech....you'll be fine. The chance that 5 HD's all fail at once is zero. If that worries you, make copies of the drive on DVD's or Blu-Ray. I have HD"s from 15 years ago that I just copied onto newer drives. I left the info on the old drive too, I have 5+ copies of all my data at least. Then the copy on my PC. It would take a nuke hitting Detroit to destroy my data. If that happened (and I survive) I'd just head to my family in LA. I shipped them a drive a few years back that I check in on once in awhile. They send it to me sometimes to update but overall it's chillin' in LA safe.