I have a 1TB Western Digital My Passport Ultra. It spins up with no noises, shows on the desktop and sometimes in Disk Utility, but I can't get any data off. Unfortunately it has 300GB of my photos on it. I tried to repair with Disk Utility with no luck. Also, when I connect a second external via a USB hub, it unmounts the first, so even if I could access the data, I couldn't transfer it to the good external. Hope this makes sense. I'd appreciate any advice. ***Yes, backup of my backup. Lesson learned.