Another friend has a stat of 30%, by the way. Even if I'd get the better of the two values, I don't have enough systems that a backup being 2/3rds of the origi

Another friend has a stat of 30%, by the way. Even if I'd get the better of the two values, I don't have enough systems that a backup being 2/3rds of the original data size reduces the number of backup disks I need to buy, but it's not insignificant either.