This page describes how to create a folder (a directory).
It is meaningless to talk of creating folder until you understand what a folder is ... so read the page on the Hierarchy or Folders first.
To create a Folder start Windows Explorer.
On the Left Side of Windows Explorer click on the drive or folder that will contain the new folder you wish to create so that it is highlighted.
Click on File to open the Windows Explorer File Menu, then move your mouse to New and then move it horizontally to New Folder and click.
This will create a new folder and you will see the on the Right Side of Windows Explorer. While the new folder is highlighted and has a box around it you can type a name for it if you have something more original to call it than "New Folder". You can rename a folder at any time by right clicking it and then choosing rename on the popup menu that appears.