https://trisquel.info/en/wiki/how-format-external-storage-device-using-parted

This page has instruction on how to make an aligned partition with Parted.

For an SD card to use in the WiiU, the formating must be done with FAT32 with bigger clusters:
<code>
mkfs.vfat -F 32 -s 128 /dev/sdd1
</code>