From your Binder view screen, click on either "Create Folder" or "Create Placeholder" and type the desired name in the box. Click the "Create" button to save it. You will need to repeat this process for each additional Folder and Placeholder.
Folder and Placeholder names can not contain back "\" and forward "/" slash marks or colons ":"
For detailed information about how to import a Folder structure template, see How do I set up my folder structure?