It says on the FAQs https://3ds.guide/faq that you just need to copy the files to a new SD card.
Is that really all you need to do? Right now, my current 4GB SD card that I use for Luma is named GM9SD
I use an o3DS
Is that really all you need to do? Right now, my current 4GB SD card that I use for Luma is named GM9SD
I use an o3DS