It does not boot from a USB, you can however move rootfs to a USB drive or HDD.
BIOS ? Not sure what you are asking about - this is a SBC. Take a look here. You can modify parameters in the /boot partition. What are you trying to achieve ?
BIOS ? Not sure what you are asking about - this is a SBC. Take a look here. You can modify parameters in the /boot partition. What are you trying to achieve ?