I don't have Nav either. But if you format a USB thumb drive to FAT32, you can use the USB plug in the center arm rest to put your music on. You can't save to it (must be a Technology package feature with the Nav) but at least you can play your tunes.
2015 F30 335i | M-Sport | Estoril Blue | Black Dakota | 6-speed | HK Sound | Cold Weather | Premium Pkg | Sill Decals | Coded
| 19" Style 442M Grey Orbit Staggered | M-Sport Brakes | MPPK | MPE | Front Splitter Black | CF Rear Spoiler | Black Grilles
Previous loves: 2013 F30 335i / 2009 E90 335i / 2007 E90 328xi