Every hard disk is too small if you just wait long enough. TreeSize Free tells you where precious space has gone to. It can be started from the context menu of a folder or drive and shows you the size of this folder, including its sub-folders. You can expand this folder in Explorer-like style and you will see the size of every sub-folder. Scanning is done in a thread, so you can already see results while TreeSize Free is working. The space, which is actually used by the file system can be displayed and the results can be printed in a report.