DXG Technology DXG-595V - Manual (Page 56)

If you select Delete All, press the center joystick button to
display the submenu.
3. Move the joystick left and right to select X or √ and press
the center joystick button to delete.
4. Press the Menu button again to exit the menu.
z Note:
Once deleted, files cannot be recovered so make sure
you have a backup before you delete. Files that have
been protected will not be deleted. You have to
unlock the files first before deleting them.
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