So my HDD says that it has 313gb of data via windows explorer, but upon backing up that whole drive it really only has 189gb of data per windirstat. http://img545.imageshack.us/img545/3830/wtfvs.png there is a picture.. What could be causing this?
I highly recommend Treesize. It can show you how much space is actually getting used and what is using it up. You can get a free version here: TreeSize Free - Quickly Scan Directory Sizes and Find Space Hogsthen use treesize