WinDirStat

Want to find out what’s taking up all the space on your hard drive?

WinDirStat is an excellent application that will display the contents of any drive or folder you select in a way that makes it very easy to see how big every file it is. You may find old unneeded files that you had completely forgotten about are taking up space, or that a program you rarely use has spread itself over a large section of your drive.