My friend is trying to hombrew their 3ds, yet can't format to fat32 for some reason, any suggestions?
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Use rufus on Windows.
That didn't work, my friend tried and it said it's not windows recommended
GUIFormat. 65536 for 128GB and above, 32768 for 32GB and 64GB. GUIFormat will use FAT32 for both clusters.
as far as i know, he has a 928GB micro SD card, with an adapter