"This was a difficult move but it was the right move because it's allowing me to do so many things that I probably would not have been able to do had I stayed at ESPN," Andrews told Richard Deitsch of SI.com.
"It's a different way to expand my role. I'm not tired yet. I don't want to hang it up. I just need to get better and these were different opportunities that I would not be able to find anywhere but at Fox Sports."
Fox has been making aggressive moves the past two years to become a player in college football, including a 12-year agreement for broadcast rights to Pacific 12 games and a similar 13-year deal with the Big 12.
Andrews will be a key player in Fox's presentation. She will host Fox's pregame show and make her debut on Sept. 1 before the Hawaii-USC game. Andrews will also anchor Fox studio coverage and have other assignments, including a role in NFL and Major League Baseball coverage. Fox is expected to announce those details this week.
Nonetheless, Andrews is going from ESPN/ABC to Fox, which is a step down in the college football world, even with the increased responsibility she will have at Fox.
Andrews could also be looking a more relaxed pace with less travel. She told Michael Hiestand of USA Today, "I need a life. I need to start thinking about starting a family at some point."