It is my pleasure to answer your question, sd card can be copied, as long as someone else's card is also in MP3 format, it can be completely copied to your card, the machine can be put on, in addition to the computer have SD socket, if not, you can buy a card reader, put the card into the reader, and then insert the card reader into the computer USB socket on the computer, you can be the songs on the computer to be examined into the card, or card songs from the computer into the card, or from the card into the computer. I hope my answer is helpful to you, if you are satisfied, please click satisfied answer,
Hope you succeed