@Alexroyer Me pasó lo mismo que a ti, y en el apartado "Troubleshooting" aparece tu caso.
1. Try booting with your SD card out, and then reinserting it after booting.
- Power off your 3DS by holding down the power button.
- Take out the SD card.
- Power on the 3DS.
- When the home menu appears, reinsert your SD card.
- If this worked, you should clear Home Menu's extdata by navigating to /Nintendo 3DS/(32 Character ID)/(32 Character ID)/extdata/00000000/ on your SD card
EUR Region: Delete 00000098
JPN Region: Delete 00000082
USA Region: Delete 0000008f
CHN Region: Delete 000000A1
KOR Region: Delete 000000A9
TWN Region: Delete 000000B1
En resumen, que si tu consola es EUR borra la carpeta /Nintendo 3DS/(32 Character ID)/(32 Character ID)/extdata/00000000/00000098 y así podras arrancar con la SD puesta
Cambiado dde tema, he instalada mi primer backup de 3DS. ¿Para eliminarlo lo haria en Configuración de consola -> Gestion de datos? ¿Que pasaria con las partidas guardadas? ¿Tengo que usar algun gestor de saves? Muchas gracias por todo!!!