Transfer music to microsd for lg chocolate from verizon?

me and my girlfriend just bought a lg chocolate today. I know this have been asked several times, i googled and read the answers from different people here but cant seem to play the music from the sdcard. I did everything using wmp and sync'd all the music to the card, now i put the card back in the phone but cant seem to find the files. Where do i go after i put the sdcard in the phone??? thank you