Very correct Fred. Most manufacturers say that memory sticks/chips are good for 2K cycles. That's why they should be a 'part' of the backup system, but not the only part. But if you figure 1 backup a day, you will be ready for a new computer around the time they wear out.
BTW DO NOT be tempted to rely on the use of a USB memory stick (USB key drive. I recently ofund out that these have a quite limitted read/write cycle life time. Ok for sharing files in real time but now I know more about them O would not use it for anything else 73 Fred G4BWP
