UPDATE: Since this post was published, I have since moved away from TreeSize Free and started using WinDirStat. Faster and more up to date. Check it out.
You would think with todays hard drive capacities you would not need to worry about wasted space. Think again. If you ever want to know what all of your hard drive storage is being eaten by, check out TreeSize Free by Jam Software. This tool has been around for years and it still comes in handy.
The reason I wanted to post about this, is because in my new computer, I only have an 80GB hard drive. When I went to install a new game which required a lot of space, my drive was nearly full. I was able to pinpoint problem areas with TreeSize and clear up 23GB.
Fire it up, choose your drive, then watch as the truth unfolds. This even supports network path/share scanning or a mapped network drive.