Delete all
1.Press the select button up or down to select「delete」and press the ok button.
2.Press the select button up or down to select「delete all」and press the ok button to enter the “delete all” file interface.
3 In the “delete all” file interface, press the select button up or down to select 「ok」and press the ok button to delete all files. Select「cancel」and press the
ok button to exit the “delete all” file interface (protected file can’t be deleted).
Protect one
1.Press the select button up or down to select「Protect」and press the ok button.
2.Press the select button up or down to select「Protect one」and press the ok button to enter the “protect one” file interface.
3.Press the select button up or down to select the file that you want to protect. If the current file has not been protected, press the ok button to protect the
current file and the 
icon will appear. Press the ok button again to
unprotect current file and the 
icon will disappear. If on the other hand, the current file had been protected, the 
icon would have appeared.
Protect all
1.Press the select button up or down to select「Protect」and press the ok button.
2.Press the select button up or down to select「Protect all」and press the ok button to enter the “protect all” file interface.
3.In the “protect all” file interface, press the select button up or down to select 「ok」and press the ok button to protect all files. Select「cancel」and press the ok button to unprotect all files.
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