Help for Installation of Home assistant on odroid C2


I’ve a odroid C2 with a emmc disk, I’d like to make a clean instal of HA, I’ve made this tutorial but the odroid didn’t boot on the usb key.

How can I do to boot on the usb key (if possible on ssh)

Thanks a lot for your help

I’m sorry for my bad English if you didn’t understand wath I say and you must have information ask me