SpaceSniffer is a freeWare (donations are welcomed) 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 situated on your devices.
J. Lorince, K. Joseph, und P. Todd. Social Computing, Behavioral-Cultural Modeling, and Prediction, Volume 9021 von Lecture Notes in Computer Science, Springer International Publishing, (2015)