GrandPerspective is a small utility application for Mac OS X that graphically shows the disk usage within a file system. It can help you to manage your disk, as you can easily spot which files and folders take up the most space. It uses a so called tree map for visualisation. Each file is shown as a rectangle with an area proportional to the file's size. Files in the same folder appear together, but their placement is otherwise arbitrary.
Check out Sequoia view at http://w3.win.tue.nl/nl/onderzoek/on...oiaview//.html - it is a free Windows program that does pretty much the same... Actually, it is an old program and there are many more free alternatives these days...
i think there is something similar ... and it was posted here long ago
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