See your disk usage

Hard drives often run out of space, which in addition to lack of file storage, can cause very noticeable operating system performance issues.  When trying to clean up a drive, it is often difficult to find what is the real space-killer.

WinDirStat is a free application that analyzes the drive and creates a visual interactive map of your drive's file usage, allowing you to see exactly what is using up space so that you can make decisions on what to delete.