Hi all,
This is a nice 
app that will show which are the directories that take the most HD space. I find it very handy. It’s about 700 k unzipped, about half that zipped, and requires no installation. Grab it HERE
From the developer: [indent]
Every hard disk is too small if you just wait long enough. TreeSize tells you where precious space has gone to. TreeSize can be started from the context menu of a folder or drive and shows you the size of this folder, including its subfolders. You can expand this folder in Explorer-like style and you will see the size of every subfolder. Scanning is done in a thread, so you can already see results while TreeSize is working. The space, which is wasted by the file system can be displayed and the results can be printed in a report. TreeSize is Mailware for Windows 9x/NT/2000/XP.
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You might also want to check on FileList at the bottom of the page, which is also . Haven’t tried this one yet.
