Command 2009. SD Card

[Vee8]

Hi

I will be taking delivery of a CLS early next week which has can play music from an SD card.

As I would like to download my itunes files onto the card for use in the car, can anyone here offer some advice on how it is done ? For example, is it essential to download itunes to the card before transferring music files ?

Thanks in hopeful anticipation

Vince