This is a hard disk space manager.
TreeSize Personal is a flexible hard disk space manager for Windows 200X/XP/Vista/7 environments. The real strength of the tool is a very close and graphical look at the details of usage by different files and directories. You can easily find out which folders are the largest on your drives and recover space on them. TreeSize Personal shows you the size, allocated and wasted space, the number of files, 3D charts, the last access date, the file owner, the NTFS compression rate and much more information for several folders or drives you want analyzed. The tool will help you search for old, big, temporary and duplicate files. The interface is very intuitive and would not need any experienced IT types. All you would need is someone with savvy on storage space and how files/folders use the storage areas in a system.
The intuitive explorer-like user interface and multi-threaded construction of the program makes it quite fast. What that means is that if you had a multi-thread processor on your machine, the application would run even faster. TreeSize Personal can be started from the context menu of every folder or drive. The main window is split into the file system tree on the left and the details view on the right. Optional gradient color bars in the file system tree give a quick review. While the scan is performed you can also browse through the results which get constantly updated. There is a wide range of graphical representation options available. This could be a very useful tool in analyzing where all that storage space is going and how best to optimize the usage.