Disk Space Explorer

Wow, just sorting files by size over your entire disk alone is worth the app!

Very easy to use, very fast, great purchase

you can drill down each branch to see which directories are occupying all the space. Really helps to prune and graft betwixt all your Hard Disks. It is very helpful

Gives you the one thing file explorer doesn't, a quick display of the size of folders and their contents. This enables you to quickly find out what is hogging space on your drive.