Mojo is a theme and has nothing to do with HDD’s external or internal, it will dispaly the same for all files no matter were they reside.
Yes you do have to add things to the hard drive folders. Follow the tutorial on the first post which will show you what you need to add. The tutorial descibes how to add the necessary moviesheets, thumbs and metadata on the HUB’s internal drive, but the procedure is the same for an external drive.
