I think you mixed up the themes a bit
You don't need iGO modified to work from SD card, on the contrary

Every iGO, but every one from the very first editions onwards, can move the content outside the basic folder even to an external card
But,considering that card support for new devices is being discontinued, apart from the ban in the operating system, you don't need anything extra. You only need this
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Make a little bit more effort next time, there's no need to repeat matter that have been chewed over many times