The easiest way to move files to or from an android phone is to connect it to a computer using the USB cable. Make sure the Droid is mounted as an external drive. You probably will have to pull down the Notifications bar and tap the USB notification, which brings up a screen with a button and a warning that if you press it you may not be able to do some things with the phone while the phone is mounted on the compputer. Press the button. Then open Windows Explorer on a PC or Finder on a Mac. The files are on the SD card and you either drag them from there to the PC or from the PC to the Music folder on the SD card. Don't forget to stop the connection by going to Safely Remove... on the PC or Eject on a Mac before disconnecting the USB cable.