WinDirStat is a program that I use almost daily. It creates a visual representation of the contents of a drive, making it simple to view, at a glance, how much hard drive space folders are using.
For people who deal with a lot of files, there are many situations that this is useful. For example, it can streamline the process of making decisions about what folders to move to another drive in order to free up space.

For people who deal with a lot of files, there are many situations that this is useful. For example, it can streamline the process of making decisions about what folders to move to another drive in order to free up space.

