I have 4 2TB hard drives. It's only the one that is failing. I back up my main hard drive, with the operating system. I don't back up the others. So far, I've gotten the most important files off. It's slow going, but I'm proceeding to get as many of them transferred as I can. Dh is setting up the new hard drive, and getting it partitioned, so Windows will recognize it, and it will be ready to go, when I get ready to put it in.