Free DiskSpaceExplorer is a simple freeware utility that scans an entire hard disk and provides size-related information for each folder and its subfolders. You can scan any drive and then find out the folder and subfolders occupying space on your hard disk. Once the scan is complete, it provides you with tree size view of all the folders and its structure in your hard drive. You can open the folders from the program to check the files in it.
You also have the opportunity to immediately delete a given folder (and move it it to the recycle bin) which is occupying the maximum space on your drive. DiskSpaceExplorer is a simple tool, but can come handy many times when your hard drive has lots of unwanted files and manually scanning them will take time.