Possible Duplicate:
How can I visualize the file system usage on Windows?
I was listening to the StackExchange podcast (either 28 or 29) and Jeff briefly mentioned a tool that you could use to see the size of directories. I may be completely wrong.
Anyway, is there a tool I can use to browse directories and get a visual indicator of their size? I need to clean up a hard drive and this would be a big help.