WinDirStat

WinDirStat is an application that provides an interactive visualization of the disk usage on a Windows computer. Its name stands for Windows Directory Statistics, and it is an open-source tool available for free download. With WinDirStat, users can quickly identify which files and folders are taking up the most space on their computer's hard drive, and can easily delete or move them to free up disk space....
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The application presents disk usage information in a hierarchical format and uses color coding to differentiate between types of files. It also features an interactive map that allows users to drill down into the details of each file and folder, providing a clear picture of how much space is being used by different types of files, such as documents, images, and videos. Furthermore, with the help of WinDirStat, users can identify duplicate files and remove them, which can help in freeing up more disk space. Overall, WinDirStat is an essential tool for anyone who wants to optimize their computer's storage space and keep it running smoothly.