Will only boot from EMMC

[DrewyNucci]

I can't seem to change the boot device from the internal emmc to the external microSD card.

Is there a config file or some way to change the boot target from the internal emmc to the sd or even usb port?

[Sakib]

You have to flash from Micro SD card
Follow the tutorial here :
https://www.8bcraft.com/retrostone2-tutorial/
Thanks,
Sakib