Want to know where all the disk space has gone? The below mentioned software programs will help you find out.
Even in the times of cheap terabytes a final truth remains: sooner or later every hard disk will near capacity. We have the solution. Use TreeSize Free to keep an eye on your disk space. Besides German and English, the tool can be installed in Chinese, Czech, Dutch, Finnish, French, Greek, Italian, Japanese, Portuguese, Russian, Slovenian, Spanish, Swedish, and Ukrainian.
TreeSize Free is compatible with any edition of Windows starting with Vista / Server 2008 (32-bit and 64-bit).

A disk usage statistics viewer and cleanup tool for various versions of Microsoft Windows. On start up, it reads the whole directory tree once and then presents it in three useful views. One of them is the treemap.
The treemap represents each file as a colored rectangle, the area of which is proportional to the file’s size. The rectangles are arranged in such a way, that directories again make up rectangles, which contain all their files and subdirectories. So their area is proportional to the size of the subtrees. The color of a rectangle indicates the type of the file, as shown in the extension list. The cushion shading additionally brings out the directory structure.






