When it’s done the scan, you’ll see right on the left panel the list of the folders and files that are responsible for the biggest disk space usage on the scanned drive. The main window itself contains slices representing the whole files and folders. The bigger the slice, the bigger the disk consumption. You can click each slice to analyze further.
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Disk Space Fan is a freeware and designed to work for Windows 7, Vista and XP. It can handle either the 32-bit or 64-bit version. To make sure that you always get the latest update, download the program from the developer’s website.