for the streaming netflix/stuff, it's called a portable HD, filled with movies, and a vlc player.
for the music in your car, it's called cd's. remember those?
What is this CD you speak of?
I know that it is still unlimited so if I want to upgrade, I need to upgrade now. Just saying its gunna suck in the future. Because they will (and probably sooner than later) make it so you can't keep your unlimited data.