old school CDs. I load up all 6 and change them out every couple months
I used to use my Ipod exclusively, but it won't work right if I leave it plugged in in this car (mostly worked perfectly in my 2011 TDI). It drains the power and resets the Ipod, which is especially annoying. The dealer had no idea how to fix it. So, I bought an SD card and put all my music on that. I just leave it plugged and it works no problem. I occasionally use satellite radio just for a change. My local radio stations blow. I haven't used a CD in my car for about 4 years.