5End the connection safely. If you do not eject safely, your smartphone resets when you disconnect the USB cable:
•On a Windows computer,
•On a Mac computer, from your desktop, drag the drive representing your smartphone to the Trash. Trash changes to Eject.
6Disconnect the USB cable from the computer when the USB Drive screen is no longer displayed on your smartphone.
The new file appears in the list of ringtones on your smartphone. You can select the new ringtone to apply to all incoming calls (see Select a file from the ringtones folder as a ringtone) or set it as a unique ringtone for a contact (see Add a ringtone to a contact).
214 Chapter 13 : Preferences