Hacking Slightly confused after reading around: installing Wii U games directly to USB HDD without SD card

[ArtemisM]

xenoblade is 9GB (13GB if you add the DLC at the same time), so you have enough of 32GB microSD Card to install any game.
the biggest game is 23GB.

performance wise, the SD card class is not really important in read mode, it'll be longer to copy the files on it from your PC if it's a lower class, that's all.

I just fetched Xenoblade X and it was 22GB, with 10GB for the DLC. I think it was XBC2 that was 13GB. I got it figured out though