That's because exFAT is mandated by the SDXC specification, whereas SD only required FAT [citation needed]. Presumably, the original reason the exFAT driver wa

That's because exFAT is mandated by the SDXC specification, whereas SD only required FAT [citation needed]. Presumably, the original reason the exFAT driver was written in the first place was to enable Android devices to read SDXC cards.