When you have come to the desired folder under which you would like to create a new folder, click the [Create Folder] button from the menu bar

Alternatively, you can right-click on the storage area and select [Create folder] from the action list, as shown below.

On the “Create Folder” pop-up window, Enter the Name and its Description. The description will help you find the folder easily.
Then, press the [Create] button to create the new folder.