Can someone please tell me what is the largest size SD card I can use in my Challenger? I bought a 64GB and took most of the day making music folders and loading music on it only to find that the car wouldn't load it when it was installed in the card reader slot. I took the card to my dealer service department and they where no help. I went to the dealer with a 16GB card loaded with a few songs I threw on it and the car recognized instantly. Has anyone else run into this problem? I used a SDXC card. Please Help.