Ok guys i have tried everything(file copiers, windows explorer copier, scanning the HDD with bitdefender, shifting usb port from front to the main back ones, using another wire) but some cyclic redundency error occurs. Even tried using cmd but it said:
Data check (cyclic redundancy check).
0 fille(s) copied.
Do you think i must try in some other computer?
Later Editted-
I just remembered that i recently gave my hdd to a friend who had given something to me and copied something else from my hdd. He had copied the contents the wanted easily. So i can conclude that the hdd i not running properly with my pc. I am also having issues with my Win7 OS. Also, before that i had upgraded to Win8 DP and then restored win7 from windows.old folder using cmd. Can that cause such errors?