I have been saving programs from my VIP722k HD DuoDVR to an external hard drive (SimpleDrive 500GB). Everything was fine until we had a power outage a couple of weeks ago. The receiver had to be reset, and in the process the hard drive was unplugged briefly (turned off first, per instructions from the manufacturer). Since then, the programs on the external drive seem to be corrupted. About 15 minutes or so into a program, it will abruptly freeze and then forward to the very end of the program. All attempts to replay are unsuccessful. I also tried to move the affected program(s) back to the DVR but got an error message (I'm sorry, I don't remember it). Last night I tried to move a program to the external drive (all programs moved since the power outage worked fine), but was informed that the drive would have to be reformatted. To my knowledge, no other power outages or surges have happened since the one a few weeks ago. Neither the receiver nor the external drive have lost power or been unplugged. Any ideas how I can recover the files on my external without losing everything I've moved over? Thanks so much!