Visualize your Hard Drive Usage with WinDirStat

Jimmy Rogers 22-08-2008

Have you noticed your hard drive has been slowly filling up? If you’ve had your machine for a while, a lot of extra “stuff” can build up over time. Whether it’s temporary files from your browser, old music files in your iTunes library, or something else, it can be tricky to hunt down and delete junk files.


Fortunately, this is help for your bogged-down drive. WinDirStat, one of the least appealingly named pieces of freeware out there, is also one of the most useful. The program rapidly indexes your entire hard drive, creates a visual map of every file, and helps you delete the stuff you don’t need.

Once you start up WinDirStat and select the drive you want to search (you can also select “all drives”), the indexing process begins. Depending on how large your drive is and how much data you have, this CAN be a lengthy process, but compared to some other indexing programs, WinDirStat does a remarkably efficient job. The folders are then organize in a standard drill-down interface. Each one has an indicator of how large it is and how much of its parent (or “higher level”) folder it takes up. This interface alone is enough to make the software worth the download.


Beyond the complex file manager, the most noticeable feature of WinDirStat is their visualization system. Check out my “C” drive’s image below:

Visualize your Hard Drive Usage with WinDirStat windirstat graphic fixed


You’ll immediately notice there are a number of colors and most of the blocks are different sizes. This is because WinDirStat marks every type of file (determined by file extension) with a unique color. The larger the file, the larger the block. Also, each visible section is part of the same folder. The column on the right, for instance, is the system folder and contains two giant, blue pagefiles (one is the regular pagefile and the other is the hibernation file).

Navigating around the image is fairly intuitive once you understand how it’s laid out. Left clicking snaps the file manager to the file or folder in question. Right clicking on any section brings up a contextual menu including the ability to zoom in as well as the ability to select the parent folder.

At the top of the screen there are several toolbar options:

Visualize your Hard Drive Usage with WinDirStat windirstat toolbar


From left to right they are:

  • Open – for selecting a drive to index
  • Refresh – this can repopulate the map with new changes
  • Open Item – opens the selected item
  • Copy Path – a very useful tool to copy the path (address within the computer) of a file or folder
  • Explorer – opens the selection in Windows Explorer
  • Command Prompt – opens a command prompt window (pretty handy)
  • Refresh Selected – repopulates the map of the selection with any new changes
  • Delete to Recycle Bin – equivalent to hitting the delete key in Windows Explorer
  • Delete (instant) – immediately deletes the selection, bypassing the Recycle Bin
  • Properties – Shows the properties of the selection
  • Zoom In/Out – Enables zooming around the graphic interface (this will highlight the enlarged area in the file manager
  • Help – opens WinDirStat help

There are more options in WinDirStat, but these particular ones are those that I have found most useful in cleaning out undesirable files. One thing to keep in mind is that while WinDirStat may allow you to access any file on your computer, be careful what you delete. Some of the files will be large and have names you are not familiar with. Deleting them directly might cause irreparable damage to your PC. I suggest Googling anything you aren’t sure about before you delete it.

If you’ve used WinDirStat, what are some things you use it for? Personally, I use it to quickly navigate my iTunes library because old podcasts sometimes get hung up in the labyrinthic file system it uses.

Explore more about: Computer Maintenance, File Management, File System, Hard Drive, Visualizations, Windirstat.

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  1. Mark
    December 19, 2009 at 5:35 am, it uses flower chart to show the disk space usage.

  2. Allan
    May 13, 2009 at 9:27 am

    How is anyone expected to make sense of the multi-colored visualization system? Directory Report looks just like the MS-Explorer but is always shows the size of directories

  3. Brutus
    August 24, 2008 at 12:47 pm

    I use this to find "misplaced" hoards of files also recommend



  4. Kevin Reynolds
    August 23, 2008 at 1:51 pm

    WinDirStat is great! I like the other two programs mentioned (TreeSize & JDiskReport) but WinDirStat has the most features, it seems to me. I have just used all three and likely will continue to do so but if I had to choose just one, it's WinDirStat.

  5. Stan
    August 23, 2008 at 11:58 am

    JDiskReport shows you a clickable pie graph of the space being used, which helps me tremendously over the other forms of visualizations. Each click shows a pie chart of the selected directory, and so on.'s free!

  6. daredevil
    August 23, 2008 at 8:42 am

    this is much better

  7. TheWolf
    August 23, 2008 at 5:02 am

    I already tested WinDirStat, but I prefer TreeSize (freeware edition):

  8. BenJoe
    August 22, 2008 at 11:19 pm

    I found 10 gigs that were being used up for now reason. This was awesome!

    • Aibek
      August 23, 2008 at 6:19 am

      Yeah it's common problem on Win XP PCs, the space just disappears after some time. Once, I had to reinstall my system just to get the space back.