Check Disk Usage in Windows 7

Question

How do I view the disk usage of all folders in Windows 7? I need to get the same result I would in Linux with the command df -h. I'm mainly interested in seeing which disk and folder is consuming the most storage space. What command can do this?

Solution

I like WinDirStat. It gives a graphical representation of file sizes and it is easy to quickly see at a glance where and what is using the most space.