I picked up a used 2014 Trail today with just under 15k miles. Now I'm trying to figure out how everything works. I searched but couldn't find information on the radio memory card function. My owners manual doesn't reflect what I have installed. The model is a 57080. It has a Toyota SDHC card already in it but I can't figure out what I can do with it. Can I remove it and load up a bunch of MP3 music and if so do I need to organize it a certain way for the radio to read it properly? Thanks for a great support forum.