Hard Drive Wrong Used size

I just reformated windows and did all the updates etc and i transfered my documents and my program files from an external back onto my computer. I transfered over at max maybe 60 gigs on a 500 gig hard drive and it says I have some 5 gigs left on it(what it said before i reformated) Im guessing I transfered over a file that tells my computer how much space I have. I did a disk defrag and it did nothing useful, Im wondering what is the way to make my hard drive check itself that it does not have that much used space in it?


EDIT* I just realized in windows old it saves all your files hence I thought the reformat deleted everything.