My 2012 150 HDi has a complete media/nav unit. There are slots for an SDi card and cd's, there's also a usb socket under the armrest cover for a memory stick and a "Jukebox" hard drive onto which you can load a huge number of cd's. It's a delight to be able to change between these four sources just by pressing the button on the lower RH stalk.
I've friend with a fancy Citroen who passed me on the stylish wallets the nav cd updates come in, so I can store cd's in the door pocket. I'd never throw them away; you can always copy them to someone deserving.