If anyone is running myserver 6 via USB on a repurposed Raspberry Pi (model 4 in my case), you may have to download the Rasberry Pi Imager (
www.raspberrypi.com/software/
) and save an image onto a MicroSD card that will update the raspberry pi to be able to boot from the myserver USB drive. Else, it may throw an error and try to boot first from a microsd card.