I left for lunch today. When I returned one folder on my Western Digital external hard drive is now giving me the error: Incorrect Function and will not open. I have opened the files today (right before lunch). It just so happens the one folder are my gradebook files!! I'm in a panic as I have to admit I've been bad and haven't backed up since before Christmas!! I've opened almost every folder on the hard drive and the files attached and so far everything else has behaved perfectly. The only one giving me this error is the one that will cause me so many problems it isn't funny. Does anyone have any suggestions? Is there a chance out there for me recovering these files?