Zend certified PHP/Magento developer

chrome os and linux

I have a dell 3120 Chromebook which had ( or still does maybe) bit I’m stuck in the eufi shell screen. I have both chromeos recovery on scandisk and gallium is on a bootable USB but computer doesn’t read them. I’ve gotten the boot order to boot from USB first but says USB not detected. Is there a way to recover from the EUFI shell? And advice would be great. I’m a noon but I’m learning. Thanks