hi so I have a micro sdxc card (400gb Sandisk) formatted using formatGUI it only can reed Firm files via fastboot3ds boot loader when I enter the main OS (Homescreen) i get a Popup saying the inserted "micro SD card could not be read" but on fastboot3ds I can select OpenAGBFirm and even play GBA roms on it no problem has anyone encountered this problem and fixed it?