Connect the device to a computer using the supplied USB cable.
From the computer, launch File Explorer or Windows Explorer or Finder.
For Windows Explorer, press the Windows+Ekeys (+E) using the computer keyboard.
For Finder, click the Finder icon located on the dock.
From File/Windows Explorer or Finder, tap Windows Phone (under Portable Devices).
Locate then open the existing music folder.
Utilize the computer to copy music files from the device to the desired location on the computer's hard drive.