issues with drives not initializing are usually due to the drive not getting enough power. Does your drive have it's own source or is it a portable drive? If it's a portable drive you need a y-cable for supplementary power. Also if you already have this setup instead of plugin both usb plugs into the wiiu, try pluggin the data cable into the top back slot of the wiiu and the supplementary power cable into an external power source such as a computer usb port or even a wall usb power adapter. I had to do this for my setup with 2 different brands of portable HDD's
He has a y cable, we've been talking about it the entire thread. But plugging the other end to the wall or computer could work.
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