TreeSize Free

Shows the size of each folder on your disk, including its sub folders
 

Every hard disk is too small if you just wait long enough. TreeSize Free tells you where precious space has gone to. TreeSize Free can be started from the context menu of a folder or drive and shows you the size of this folder, including its sub folders. Each folder can be expanded in Explorer-like style to see the size of its sub folders. Scanning is done in a thread, so you can already see results while TreeSize is working. The space, which is wasted by the file system can be displayed and the results can be printed in a report. TreeSize supports Unicode file names and considers NTFS compression when calculating the allocated disk space..  More...