If this is true then the limitation isn’t physical. They could easily update the OS to handle 4GB as normal. I thought they were doing something like this as part of the new storage solution for the Wii.? If 4GB is possible, what about SDHC? If they gave you the option to save virtual games on it, i would understand, other than that i don’t see the need for anything more than 2gb for save files. If you used the wii homebrew channel, yes.”]
Source: https://gizmodo.com/easy-hack-circumvents-the-wiis-2gb-sd-card-limit-5067659