2.Press the 
and 
navigation buttons until you have selected the Protect menu.
3.Using the 
and 
navigation buttons, select LOCK to protect the file or CANCEL to unlock it.
4.Press the OK/Enter button
to confirm your selection.
A lock icon
will appear on the LCD screen if you have selected to protect the file. (Note: Formatting a memory card will delete protected data too).
Delete: 
Delete unwanted photos and videos at any time to free up memory. You can delete one image or video clip at a time or delete all the unprotected photos and videos that are currently recorded on the memory card at once.
1.Press the menu button
.
20