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To find what is using space with WinDirStat, scan the drive or folder that is nearly full, sort the results by size or open Largest Files, then use the treemap to locate and review likely candidates. Treat the results as a map—not permission to delete: check each item in File Explorer before cleanup, then refresh the scan.
Choose what to scan
Start with the drive showing the space shortage, or scan a particular folder if you already suspect where the files are. WinDirStat can scan drives and folders; its feature list also includes multiple folders, network shares, and MTP devices. The project’s homepage describes the available scan and analysis features.
Open WinDirStat and select the drive or folder you want to inspect. Scan only the locations relevant to the problem; scanning a narrower folder can make it easier to focus on the files you can actually manage.
Find the largest files and folders
When the scan finishes, use the results list to sort by size, or look in the Largest Files view for large individual files. Select a result to locate it in the visualization. Extension statistics can also show which file types contribute to usage, but a file’s type alone does not tell you whether it is safe to remove.
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Read the treemap
The treemap gives a visual view of the scanned files and their locations:
- Rectangle area: larger rectangles represent larger files.
- Color: indicates file type.
- Nesting: shows how files sit within the folder structure.
Use the list and treemap together: find a large result in the list, select it, and follow its location in the visualization. A large block is a clue to investigate, not a recommendation to delete it.
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- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Review files before cleanup
Before removing anything, open or locate it in File Explorer and confirm what it is, where it belongs, and whether you still need it. Do not delete unfamiliar Windows, application, or personal files just because they are large. If you are unsure about an item, leave it in place and investigate its purpose first.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →WinDirStat also describes duplicate detection and searches by file name, size, type, or owner, as well as comparisons of logical and physical size. These features can help narrow down what to inspect; they do not establish that a particular file is safe to remove.
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- Easily store and access 1TB to content on the go with the Seagate Portable Drive, a USB external hard drive.Specific uses: Personal
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop. Reformatting may be required for Mac
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Refresh results after making changes
After cleanup, refresh the affected results so WinDirStat reflects the current contents. The project’s official workflow recommends reviewing candidates in Explorer and refreshing after cleanup.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Windows support and download options
WinDirStat’s resources page lists Windows 7, 8, 8.1, 10, and 11, plus Windows Server 2008 R2, 2012, 2012 R2, 2016, 2019, 2022, and 2025, as tested targets. The page says other versions may work but are unsupported. Check the official downloads page for the current release and the package that matches your system. It lists x64, x86, and ARM64 installers, portable ZIP and 7z archives, a Microsoft Store option, and installation commands for winget, Chocolatey, and Scoop.
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- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
The project describes WinDirStat as free and open source. Its download and resources pages give conflicting GPL license-version statements, so consult the license accompanying the specific release if that detail matters. The official blog announced WinDirStat 2.2.0 on January 6, 2025, but that announcement alone does not establish which version is currently latest.
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