If using an emulator or SD based flashcart, you can just copy the .sav files somewhere else for safekeeping. To export the track as WAV you will need some other software like Audacity or a DAW to record the songs as they are performed.
thank you for your support! have fun and let me know if you have any more questions. Oh and be sure to tag me if you upload something on socials. Love to see what people come up with ;D
