I covered software programs or Windows Explorer extensions that would display hard drive space usage before. (for example Folder Size or JDiskReport Hard Drive Analyser) FoSiX is another tool that displays the storage consumption of each system partition that, hard drive and external device that is currently connected to the computer.
The software provides a clean [...]
Visualize Hard Drive Space
JDiskReport Hard Drive Analyser
JDiskReportenables you to understand how much space the files and directories consume on your disk drives, and it helps you find obsolete files and folders. The tool analyses your disk drives and collects several statistics which you can view as overview charts and details tables. This is a great tool if you are looking for a program that analyses your hard drives content. Shows lots of useful information like which filetypes use the most space on your hard drives, file modification and folder size.

