I was using RAID-1. My question is: when the new drive arrives is just a matter of plug it in? How does it know it should copy from the “good drive” to the new drive and not the other way around? Also, what happens if I put a driver with different files? I am not sure if the drive they are going to send will be formatted for Mac. I don't want to do anything wrong when the drive arrives. Has it happened to anyone?