Download All Nintendo WiiU Roms Loadiine, NUS, WiiU, WUD, WUP, WUX Tutorial
The wiiU Nintendo Update Server format is basically a folder of different files such as .app, .h3 etc. These are all encrypted files. If you buy a game from the Nintendo eShop it is downloaded in this format. You can also convert a disc game to this format using a tool such as Disc Extractor.