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Every hard disk is too small if you just wait long enough. TreeSize Free tells you where precious space has gone to. This tool can also be installed as a portable product. In other words, you could place TreeSize on a removable device and directly run the executable file on any computer. Also, your Windows registry entries would remain unchanged. Additionally, you can view error messages during scanning, choose colors for the size indicator in the folders background, set a filter to include only certain file formats, enable the option to force the scan to run on one thread only, and more.

TreeSize Free can be started from the context menu of a folder or drive and shows you the size of this folder, including its subfolders. You can expand this folder in Explorer-like style and you will see the size of every subfolder. Scanning is done in a thread, so you can already see results while TreeSize Free is working.

The Explorer context menu is supported within TreeSize, as well as the usual drag & drop operations. The disk space tool now also includes the main feature of our discontinued freeware NTFSRatio: TreeSize Free can display the NTFS compression rate.