Everyone here is talking about the life of either drives or and media. The key point ought to be that data must be regenerated within a specified period to avo

Everyone here is talking about the life of either drives or and media. The key point ought to be that data must be regenerated within a specified period to avoid bit rot (through loss of remanence). No matter how many backups you have if they're all made at the same time then they should all be regenerated at the same time (and within the storage safety margin period).