To add a folder press the "Add Folder" button. A pop-up dialogue will appear that will ask you for a folder name and description. Once you have entered the information choose "Add" and the folder will be added. The status of the add will appear in the Add Status section. You can add multiple folders at a time. When you are finished, press the "X" button to close the window. Your folder list will have been updated.
To view a quick video demonstration click here: Add Folder