I recently replaced my hard drive in my MacBook running OSX Mountain Lion due to it's impending failure. Prior to replacing the drive I copied documents, movies and pictures onto a flash drive. After replacing the drive and installing Mountain Lion I transferred the files on the flash drive back onto the computer. Now when trying to open a photo (.jpg) I get a message: "The file “*****.jpg” could not be opened. It may be damaged or use a file format that Preview doesn’t recognize." I've checked other forums etc. but still have not figured out a solution. Any advice? Thanks.