Industry IT Water-Cooler for Power-Users:
How To Recover Misused HDD Space
 
Posted 2/14/2012 on 2/14/2012
Take Away:

Quite a few times, I've attempted to use the standard Explorer to try and track down mysteriously missing disk space... and failed miserably; no nested file sizes. But there's light at the end of the tunnel.

KB102360

Welcome to WinDirStat

WinDirStat is a disk usage statistics viewer and cleanup tool for Microsoft Windows.

On start up, it reads the whole directory tree once and then presents it in three useful views:

  • The directory list, which resembles the tree view of the Windows Explorer but is sorted by file/subtree size,
  • The treemap, which shows the whole contents of the directory tree straight away,
  • The extension list, which serves as a legend and shows statistics about the file types.



The treemap represents each file as a colored rectangle, the area of which is proportional to the file's size. The rectangles are arranged in such a way, that directories again make up rectangles, which contain all their files and subdirectories. So their area is proportional to the size of the subtrees. The color of a rectangle indicates the type of the file, as shown in the extension list. The cushion shading additionally brings out the directory structure.
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