Woffice comes out of the box with a working File Manager - File Away - which will offer you must-have functionalities to manage all of your files and directories.
Since the version 1.4.4, we have ditched Multiverso, in favor of File Away. Therefore, Multiverso is no longer required during the installation process, but it's still bundled in the woffice/inc/ folder - so you can still use it.
File Away, has more options, it's way stronger and act as real file reader (like a FTP in some way). The only disadvantage is that you need to setup the roots first (see our explanations).
For the most dubious or audacious users, you can also try your hand with whatever plugin you want - we especially have some customers using BuddyDrive.