If you want compatibility with the Wii U, your SD Card must be formatted as FAT32.
If you want the best compatibility, people have reported the most success with 32k or 64k clusters, more-so 64k.
it was so easy to find valuable minerals in breath of the wild, I always had at least 20000 rupees in my pocket now there's fucking zonaite everywhere in tears of the kingdom which has almost no value