Originally Posted by androidmog
Your problem probably lies in having formatted the card on your PC. The manual that came with my SGS says "Formatting your memory card on a PC may cause incompatibilities with your device. Format the memory card only on the device"
Thanks for the suggestion. I've tried formatting the card on my phone as well and then transferring the music over via the Samsung Kies software, but this still results in the empty folders that take up a lot of storage space.
During the file copy process I can see that the music is being transferred successfully, but as soon as the process is complete most of the songs just seem to disappear from the SD card before I've even disconnected the phone from the computer.