Disk Space Analyzer

How to analyze hard drive space with WinDirStat on Windows 10

Is your PC suddenly running out of space? Use WinDirStat to analyze and find out what files are filling out the drive to free up space on Windows 10.

WinDirStat disk space analyser for Windows 10

Although Windows 10 includes Storage sense to analyze the hard drive and free up space, it has some limitation as you cannot see what files are taking the most space, and this is when WinDirStat (Windows Directory Statistics) comes in handy.

WinDirStat is a free third-party tool that has been around for a long time, and it’s a hard drive usage statistic viewer that allows you to see exactly what files are taking the most space on your device. It does this by scanning the entire drive and generating an easy to visualize report with the size and location of each file, which is useful information that you can use to cleanup space on Windows 10.

In this guide, you’ll learn the steps to using the WinDirStat app to find out what files are filling out the hard drive on Windows 10 to take action accordingly.

Use WinDirStat to analyze what files are taking up space on Windows 10

To understand what’s taking up space on Windows 10, you first need to download and install WinDirStat, and then run the tool.

Warning: This is a third-party software, and even though, it’s a nondestructive application, and it usually works as expected, you have to use it at your own risk. You have been warned.

Install WinDirStat on Windows 10

To install WinDirStat on Windows 10, use these steps:

  1. Open WinDirStat download page.

  2. Click the Download button.

    WinDirStat download
    WinDirStat download
  3. Double-click the windirstatx_x_x_setup.exe file to begin the installation.

  4. Check the option to agree to the terms.

  5. Click the Next button.

  6. Leave the default settings.

  7. Click the Next button.

    WinDirStat installation settings
    Installation settings
  8. Click the Install button.

    WinDirStat Windows 10 installation
    Installation button
  9. Click the Next button.

  10. Clear the Run WinStart option.

  11. Click the Close button.

Once you complete the steps, you can use the app to scan the entire drive and get a report of the current hard drive usage.

See files taking up space on Windows 10

To use WinDirStat to determine what files are taking up space on Windows 10, use these steps:

  1. Open Start on Windows 10.

  2. Search for WinDirStat and click the top result to open the app.

  3. Select the Individual Drives option.

  4. Select the drive you want to see what files are taking up space.

    WinDriStat select drive
    WinDirStat select drive to analyze
    Quick tip: Although you can scan all the drives, it’s recommended to scan one drive at a time to minimize resources impact and speedup the process.
  5. Click the OK button.

    Quick note: If the device is running low in space making the experience very slow, you’ll notice that the app will freeze showing the “Not responding” message, but eventually, it’ll complete successfully.

After you complete the steps, WinDirStat will scan the drive, and it’ll show you a graphical report allowing you understand what files are taking the most space on the hard drive.

WinDirStat scanning drive
Drive analyze

The report is divided into three main sections. In the top-left side, you’ll see a tree file structure that lets you see which folder is taking the most space. You can drill down to find out the file using the most space on the hard drive.

WinDirStat drive usage report
Storage usage report

On the top-right, you can see what file extensions are using the most space.

Also, at the bottom, you’ll find a graphical view known as treemap that represents each file as a rectangle. The bigger the rectangle the bigger file on Windows 10. The color of each rectangle represents the file type as shown in the extension list.

You can select a rectangle to quickly find out the file name and location.

See file taking up huge space on Windows 10
See file taking up huge space on Windows 10

If the file using a lot of space is one of your personal files, then you can simply use File Explorer to find and delete. Also, you can right-click the file within WinDirStat to access options to copy the path of the file, open folder location with File Explorer or Command Prompt, and you even get two options to delete the file.

WinDirStat cleanup options
WinDirStat cleanup options

However, sometimes, files growing huge on your device are system files, and typically, you can’t just click the delete button to remove it. If it turns out that it’s a system file, then make a note of the name of the file and research online how to remove it or reduce its size to free up space on Windows 10.

For instance, it’s known that if you’re indexing the Outlook PST file, Windows 10 will trying to index every email, and if you don’t reduce the amount of emails the client downloads on your device, you could end up with a huge Windows.edb file taking up all the drive space. If this is the case, the proper way to reclaim the space is to rebuild the index database, and not deleting the Windows.edb file.