There are four default libraries (Documents, Music, Pictures, and Videos). Besides them, you can also create new libraries for other collections.
To create a new library • Click the Start button , click your user name or any other Windows Explorer window, and then, in the left pane, click Libraries. • In Libraries, click New library on the toolbar. • Enter a name for the library, and then press Return key. To copy, move, or save files to a library, you must first include a folder in the library so that the library knows where to store the files. This folder will automatically become the default save location for the library.