Nextar Digital MP3 Player Owner's Manual page 21

DELETE ALL: Under the Delete mode, press the ►►| ◄◄ button to
or |
select "delete all", press the M button to enter the delete selection mode,
repress the ►►| ◄◄ but-ton to select YES or NO, If you select YES,
or |
repress the M button to confirm deleting all the files in this device. Select NO
to exit.