SOFTWARE: SpaceSniffer

SpaceSniffer is like WinDirStat and a few similar programs,it scans your drive and creates a visual representation of all the stuff that’s on it, so you can see at a glance what’s cluttering your boot drive. From there you can right-click to interact directly with files and folders—anything you can do from the right-click context menu, like delete, cut, copy, and paste, you can do in SpaceSniffer.
SpaceSniffer is a freeWare (donations are welcome) and portable tool application that lets you understand how folders and files are structured on your disks. By using a Treemap visualization layout, you have immediate perception of where big folders and files are placed on your devices. Treemap concept was invented by Prof. Ben Shneiderman, who kindly permitted the use of his concept into this tool.

It is small tool but powerfull.
More Detail in visit: http://www.uderzo.it/main_products/space_sniffer/

DOWNLOAD HERE:

SpaceSniffer