Creating Folders: To create a new folder click on "Account" in the top right hand corner, then select "Library". You will then see the button to the right called "Create Folder".
Note: Only users that have the "Manage file folders" permission active are able to create new folders. This way you can control what is saved in your library and make sure you always have the most recent versions available for your colleagues. If you have the "Manage file folders" permission, you can only create folders that will only be visible to your group(s). For a folder to be shared with everyone in the company you should be a main system admin and have access to all groups and folders.
Managing folders: To organize the library better you can rename or remove any folder. Furthermore, you can also create sub-folders, which will keep the same privacy setting as the parent folder.