So, I'm getting a 500GB external hard drive for my wii u along with a Y-splitter cable (will get here by saturday as of posting this) and I just had a simple question: Why is a Y-splitter needed for an external hard drive on wii u? I've heard that it has something to do with the system not supplying the HDD with enough power but is there more to it than that, this is being asked out of curiosity btw.