Well then, TreeSize can tell you where precious space has gone to. TreeSize 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 is working. The space, which is wasted by the file system, can be displayed and the results can be printed in a report. TreeSize is a handy little program that tells you where all your disk space has gone. This is great if you are running out of disk space or planning a format and want to know where all your data is on your hard drive.Results can be sorted according to size or name and sizes can be listed by percentage or space-used (in KB, MB or GB). Folders can be expanded in the results view just like in Windows Explorer, so you get a full view of which folders are really taking up all that space. This is the free version of TreeSize (the paid version includes extra features such as 3D graphs, last access dates and owners of files as well as scanning network drives) and works on Windows 9x/2000/XP/Vista. Using TreeSize is a great way to do some spring cleaning on your PC