Disk Triage provides the capability not only show the information in the tree - but also statistical information gathered while performing the sizing. As well - Disk Triage can gather the information for the sizing as a whole - or record it by directory. The screen capture below shows how to set Disk Triage so that the statistics are gathered by directory.
After the scan is performed - the user is able to view the various statistics by directory - as shown in the following two screen shots. As the user selects a directory in the tree to the left - the graph to the right is updated. Here the user has selected the root directory.
Here the user has selected a sub directory. Note that the graph has changed showing that the largest amount of space used in the directory has changed from MP3s to Doc files.