After spending days following some obsolete or incomplete or just too long and specific guides, here is my take on setting up a Wii in the year 2020
- Format SD card with 1 partition of 32kb clusters:
sudo mkdosfs /dev/sdXX -s 128 -F 32
. Up to 32GB SD-HC should work fine, despite what was said in old forums - Install BootMii + HBC with LetterBomb: https://wiibrew.org/wiki/LetterBomb
- BACKUP your NAND with BootMii to be safe from bricking: https://sites.google.com/site/completesg/how-to-use/bootmii This is mostly for peace of mind though
- Install cIOS 249 base 56 v10 beta52 on slot 249 and base 57 on slot 250. This is the most complex step, be careful to follow the instructions here: https://sites.google.com/site/completesg/backup-launchers/installation