I accidently deleted a lot of files, (mostly jpeg images and .mov files) after partitioning my external hard drive. I found a file recovery software and used it, the files were recovered to my desktop however nearly all of them are unable to be opened. An error message appears saying: "Couldnt open the file. It may be corrupt or a file format that Preview doesnt recognize." <---(In preview) If anyone has any suggestions, it would be much appreciated.