I am trying to buy a new external hard drive. My current 500gb WD is about to die. I currently use usb 2.0, but I am interested in firewire since I transfer large image file often. I was interested in WD my studio with firewire, I purchased a WD passport my studio and experienced problems with it unmounting/shutting off while transferring, so I returned it. After some research it appears that EVERY hard drive that uses firewire randomly unmounts/shuts off?! I have read a lot of reviews on WD, Seagate, and Lacie drives and all have some complaints of this same problem. Does anyone actually have a firewire drive that works and is reliable. If the drive randomly unmounts, I do not consider this reliable. Any help/recommendations would be great. Thanks!