You can install only ONE game at a time.The downloaded games need to be the region of your Wii U.In order to get your HDD to be recognized you may need to use a split USB cable.Attention it will DELETE everything on that drive. If you want to install on HDD, you need to format your HDD to WiiU format.Here is his compilation, to quote: Wii U USB loading - Install WiiU Games to USB or Internal Memory Similar to the PS4 Brazilian Game Sharing Method (not to be confused with the PlayStation 4 Russian Jailbreak Method) and following the recent Wii-U ROP / OTP Hacks, today BurningDesire documented the Brazilian Team's Wii U Jailbreak Method to install and run game backups by modifying Nintendo eShop Tickets using internal memory or USB loading!
