After you have determined a sound category structure and confirmed the design with your end-users and other stakeholders, you may begin to create the top-level categories. Only the Coordinator role in the SharePoint Portal Server workspace can create new categories.
All top-level categories will be associated with a top-level category folder in the Categories folder in the workspace directory. Subcategories will also have a folder associated to them under the appropriate category.
The Coordinator will use Windows Explorer to create the categories in the workspace. To create new top-level categories in the workspace, do the following:
Open the Windows Explorer.
Navigate to the appropriate workspace.