Chris has several terabytes of video and photos backed up on spinning hard drives. How long will they last? Leo says they can last a long time, but he will want to be sure that they are powered down properly, removed from the enclosure, and wrapped in bubble wrap. Is that the safest way to back up? Leo says it could be safer than discs. But another good idea is the Amazon Glacier. They will back up on drives (they'll even send you one) and then back it up for a very low price. Just don't expect to get it back quickly.