I had seen Plailect's Guide FAQ and Luma3DS FAQ, but I can't solve it.
(It is a New 3DS LL(JPN) and it has been installed A9LH.)
My friend didn't know that using 64G microSD need to change it to FAT32.
(he use 32G before.)
It is inevitable that he can't boot, and he try to use old sdcard to...