I converted the a nkit.iso file to wbfs and use the wiiflow, cfg usb loader to open it, either of the programs went to black screen and my wii u just frozen. I also tried to convert a another pal iso named compressed iso to wbfs file and it still didn't work. I can't get the usb loader gx to read my usb drive, I use a usb card reader with a microsd card. What should I do?