He explained it simply. "Think of Aurora as a huge, beautiful library. The librarian who knows where everything is—that's the operating system. Right now, the librarian is sick and can't find the front door. This little USB drive? It's a tiny, emergency librarian."
Leo plugged the USB drive into a port on Aurora. He restarted the computer, pressed a special key (F12, he called it), and told the computer, "Don't listen to your sick librarian. Listen to this one." what is a recovery disk
"This," Leo said, holding it up, "is a life raft. It's called a recovery disk." He explained it simply
"What can it do?" Elena whispered.