Hi, I wonder if someone with some technical knowledge can give me some advice. Last night I, in a pretty sleep deprived state, pulled out my usb3 hdd without ejecting it. I've never done such a stupid thing before! I couldn't sleep and just edited a few photos for fun. The only thing on the hdd is my aperture library. I've often read about doing this destroying hods. So this morning I plugged it in, OSX saw it, I opened Aperture and it said my library may have corrupt files and asked if I wanted it to repair them, so I clicked yes, it took a few minutes (I have lots of photos). I expected disaster yet all seems fine. All my photos are there. Even the last adjustments I made have been saved, and work done last night via Nik software viveza also had been saved. I simply can't find anything wrong. I guess this means I've been lucky. What I had done was quit Aperture, wait a few moments until it quits while at the same time I could hear the hdd working and then it stops spinning, goes quiet and the light stops flashing - I hadn't slept the night before and just unplugged without thinking when it went quiet. I think those few seconds I waited, so that the hdd wasn't working, probably saved me from losing all the files. My question though is - does this simply mean another part of my hdd is damaged and I had a lucky escape? If I keep using that hdd does that mean that sooner or later (it's currently 30% full) I'll come to a broken part and then encounter problems? I don't have any technical knowledge of hdds. I could retire this one to just be a stay at home extra redundant back-up and buy another and transfer my library onto the new one but I don't know if I need to (I already have a back-up) and if I'm being paranoid. Anybody know enough about the workings of hdd to advise? My advice - don't use your external hdd when you haven't slept!