Windows Desktop/Server: Check Disk Space Usage by Folder
Linux users have asked us the question “What is the equivalent to the command du in Windows” several times. There is more than one way of achieving this but by far the simplest way if you are using a gui version of Windows Server (or of course any version of Windows Desktop) is downloading a very handy application called FolderSizes. You can download FolderSizes by clicking this link.
FolderSizes will very neatly present to you the usage of every folder/directory on the computer or server. The application searches and analyzes folders recursively.
There is of course also ways to do this with PowerShell but they require a bit of scripting knowledge. Microsoft has this documented on TechNet for those looking to apply this in a script form.