500 GB Elite

Hello All,

I am facing a very weired issue on my WD 500GB elite. I have been throwing files in to my hard disk and didnt make any settings. now when i am creating new folders it is creating them as .exe. but still most of the folders which were previously created are opening but any new folder  I am creating as long as it reamains empty it open but as soon as I place my DATA into the folder it doesnt allow me to open it at all and by doing this i have realised that ihave locked my self in to a situation where i cannot access my very important office data for which i dont have any back up as wel

please assist me in this regards