You don't need a micro SD card to sync music. There are many ways to sync music.
1. You connect the phone to the computer via USB and put music files in LG VX8575>Internal Memory>Music
2. Also with USB, you can go to Tools>USB Mass Storage and your computer will recognize the phone as a Flash Drive. You can then put music in the my_music folder.
3. You connect the phone to the computer via Bluetooth and browse files on the phone, then put files in the MyMusic folder.
4. Also with Bluetooth, you can put files in your Bluetooth Exchange Folder on your computer, then Browse for the file on the phone.
5. I have had success a few times by downloading them via the Web Browser
6. And if your music file is less than 500 KB, then you can email it to your phone at
number@vzwpix.comI hope one of these helps!