There are many tools that tell you where the biggest space hogs on your hard drive are, but none does it as clearly as SpaceSniffer. The reason is that this program displays its finds as a so-called treemap; a way of presenting your hard drive as a rectangle and subfolders as boxes in it. You can click on each of those boxes to see which is the largest within it. If desired, SpaceSniffer can colorize the boxes based on the type of content, and you can also customize other aspects of the appearance. Recommended!
Find SpaceSniffer here.
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SpaceSniffer – Overview of your disk space
