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is it possible to boot this board from usb somehow?
Armbian has that option. Whether it works with this board or not, that I do not know. You could give it a try!
Attach the USB storage device
Navigate: System -> Install
If the USB storage device comes up as an option, give it go.
NOTE: It will format the whole USB drive/stick/etc. So I'd test it with a USB stick first, unless you got a drive laying around you don't mind torturing.