Okay, so you’ve got a big folder full of stuff, its got a complicated directory structure and you want to know what what folders are taking up all the space.  Simple?  Well, no – not really.  Unless you have something like JDiskReport.

jdiskreport_med

JDiskReport is a Java based application that traverses your folder structure, and gives you a nice graphical representation of the folder sizes.  It works on Mac, Windows and Linux and comes highly recommended.