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I have a Maxtor external hard drive which I store many photos on in the camera's raw format and also the converted jpegs. I have the photos broken down into several folders on the drive. Recently, one of the folders seems to be corrupted and many gibberish folders are added to the drive. I have run a data recovery software that seems to have found the files and I restored them to my C drive but when I try to open any of them in PS or any other browser I get the message unable to open invalid jpeg marker, or the file is truncated or incomplete, or if it does open it is just a black and grey image. Most of the other folders seem to be fine, but I can't understand what has happened to this one.