I ordered two Seagate drives more and backup 2TB version two different colors I went on a trip with the two below the elbow. Plugged into a USB Asus UX31 3 both drives are recognized as two different units and there I'm happy (those who have had WD understand what I mean). The discs work well and I'm happy. Then one night I get off 25GB of photos on one disk, I check that the photos are copied and I erase the SD card from my SLR. The computer goes into hibernation. I come back, I leave hibernation computer. I unplug the disks. I reboot and I plug disks and there is drama. I have one drive that retrieves the id of the other disk and deletes all folders me. Obviously you will understand it is one on which was the pictures. Lost my three-week vacation immortalized. I am green !!! Fortunately, Seagate Backup Plus calls !!!