I have ever tried a free drive recovery tool
that works really well. You can give it a shot.
At that time, my WD 1TB flash drive was attacked by virus and became inaccessible, which has held all my photos, videos, songs and files. I nearly burst into tears after realizing this bad situation. After searching on the internet, I eventually found this drive recovery freeware that finally recovered all my lost data back. Just like a miracle.
Therefore, I believe it will help you. You could download it there: http://blog4mark.blogspot.com/2012/12/deleted-files-recovery.htmlImportant note
: You are supposed to make data backup regularly in case of similar problems.