Excuse me if this is a stupid question, but I cannot find a answer or I am searching incorrectly.

I just got my Z2 and I cannot figure out how to hook up a usb thumb drive with mp3's to it.

Do I need the CD-IB100II to do this? or is it iPod only?

The CDIB100 is for ipods only. You can buy the CDUB100 but the interface is crappy. Better off just buying a cheap ipod