I just put music on my card but i dont know how to

First you need to make sure that the music files that you put on the card are compatible with your phone. You have to tell the phone where to look for the music files. Access the menu on your phone, and look for "memory." You have some limited memory on your phone itself, but you want to access the memory card. You can also set your phone to "save to" the memory card as well for videos, etc., this way you won't fill up your phones memory, and it is easy to transfer you files between your phone and other devices, computer, etc. My phone for example will play only the files on my phone by default, until I set it to play files from the memory card. You need to learn more about your particular phone, not so much the memory card itself. Please rate appropriately and leave a response. I hope this helps and good luck.