Connect the device to a computer using the supplied USB cable.
From the phone, ensure USB Mass Storage Mode is enabled.
From the main screen, navigate: MENU > Settings & Tools > USB Mode.
Utilize the 5-way navigation pad to highlight and the OK button to select.
Select USB Mass Storage.
From the computer, launch File Explorer or Windows Explorer or Finder.
For File Explorer or Windows Explorer, press the Windows+E (+E) keys using the computer keyboard.
For Finder, click the Finder icon located on the dock.
Using File/Windows Explorer or Finder, create a new music folder in Removable Disk (X:).
Removable Disk (X:) represents the SD Card installed in the device. This name may vary.
Utilize the computer to copy music files into the new directory.