The hard drive wasn't dropped. It's a sata and was plugged into a Blacx docking station. It was fine one moment and not the next. Whatever happened was instant. I previously said there was 50 movies backed up on it. Actually there was 140 movies. It's a sata 750 GB Seagate Barracuda HD. It hasn't been treated rough at all. It wasn't moved from it's position prior to this problem. It isn't bad. It's like something is telling the PC there's nothing on it. No one else uses this PC. I have other PCs and they read it the same way. I feel the data is still there but I'm at a loss to recover it. It's a good thing I have all of these movies on DVD. It appears home computer technology is unreliable. I am a PC tech and this one stumps me. Any response is welcome from anyone who may have suggestions.