When I run into a PC that has low disk space, there are usually culprits that you can point a finger at.  The problem is that sometime the disk usage is not taken up in the folders that you might expect.  When there is no smoking gun, I turn to my toolbox to check where the disk usage is being taken at. Below are a few tools that I use to see what is causing the issue.  There are many tools out there but here are my favorites…

  • WinDirStat – 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.

WinDirStat Disk Usage Analyzer

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. (Content provided by WinDirStat Homepage)

Download Here


  • Spacemonger – The newest version is no longer free so the homepage here only reflects the latest build of the software.
    • Claims to be 6x’s faster than WinDirStat
    • Scan, map and manage PC, network and cloud storage
    • Copy, move and delete files to free up storage space
    • Locate large files and folders quickly with Treemap visuals
    • Find files by size, type and custom criteria with flexible search
    • Take clean-up actions on dynamically built file lists
    • Options to run in command line

Download Trial Here

Download Old Version Here