How to burn SDcard with the bpi-m5 SD files

Hello Everyone,
I want to burn SDcard after successfully compiling the bpi-m5-bsp files. But I am confused about the guide:

So what’s the meaning of " Get the image from bpi and download it to the SD card." ?
In addition, I meet an issue when I copy the SD files to SDcard and run “ 6”.

Would appreciate your response.


here enter “1”

please choose a target to install (1-1):

Yes, I’ve confirmed that it works. Thank you.