The firmware included with the Raspberry Pi 2 Model B version 1.2 introduced the possibility of booting from a USB device: before that, it was only possible to boot from an SD or microSD card. But ...
The Raspberry Pi 4 launched in late June and as usual, it’s a major upgrade over the prior model, packing more RAM, enough graphics horsepower to drive a pair of 4K displays, and USB-C charging ...