How to install OS with a USB drive for Sophgo SG2042

Hi all,

I am trying the install OS for Sophogo SG2042 following the instructions here (OS installation steps | Milk-V).

I burn the OS image to a USB drive. But I cannot boot from USB drive (the USB drive is not showing up at boot).

Is there a way to install OS using a USB drive?

Thanks,
Yushan