O&O DiskStat provides you with an overall view of just how your hard disk is being used. It lets you track down those files and folders that are taking up too much space on your hard disk, and causing your computer to slow down. You can sort by category, file type, view them in Explorer and export them as a table. A further major function to speed up your systems.
Understanding the chart
The chart displays files or folders and shows their comparative sizes. Individual sizes are shown in the labels. Smaller files and folders are lumped together and displayed as such.