TreeSize

TreeSize is a small and useful utility that shows you how your disk space is being used and which folders use up the most space.

The integrated file search enables you to find search old, big, temporary, and duplicate files specifically. Redundant files can be deleted or archived to a zip file.

The application features an intuitive Windows Explorer-like user interface and works in the background. TreeSize Personal can be started from the context menu of every folder or drive.