The Radxa Zero can definitely be set up to boot from USB storage / using a SSD. You can do this trick using both the eMMC and an SD card. Given that the board also has a quad-core processor you can actually make a tiny and pretty powerful server setup with something like this achieving pretty impressive I/O speeds for such a small package.
In this guide I’ll show you how to set up SSD booting on the Radxa Zero using their official Debian operating system. Let’s get started!