Hi I liked what I read about the auto backup feature so bought 2 of these, one for myself and one for a friend who has some important files on her laptop. My friend has 8.1 and was the first time I tried this drive and the software. Just using the included WD Backup it worked fine. I've got Win 7 Home Premium x 64 on a Dell Inspiron and the drive I bought for myself seemed to work except that while trying to install WD Backup it couldn't identify a backup target. I got WD to replace it, but the same thing is happening with this one. Ive emailed their support and have rec'd a reply but it was just a couple questions I had to answer for starters. I've since read that the WD drives like this have a high failure rate? I purposely bought WD because I've had a number of their internal drives that have been very reliable. I just looked on CNET Download and saw there are a great number of well regarded free backup apps. I'd appreciate any good experiences with any one of them. I want to be able to unplug the drive except when I want to back up, and then would prefer the process to be simple, I.e. just plug it in, open it, and click "backup" on the soft ware and have it update any previously backed up files and copy any new ones. Also would like to create a mirror of my operating system on the backup drive. Thanks!