Turris OS USB boot

I have firmware image but I don’t want to install it on Turris Omnia because the device owner is not me. But I need to test the build, so is there a way to make Turris Omnia boot from USB?

booting from USB is something that we’d like to have, but since Turris OS 3.10 it is possible to boot from mSATA SSD.

Documentation is currently for experienced users.