PNI VOYAGER S800M Manual De Usuario página 6

2. Delete and Protect: In playback mode, long press Mode button,
select "Delete", you will have two options: "delete current?" to
detele the selected file, and "delete all?" to delete all the files on
the memory card (except the protected files).
Press OK button to select and confirm.
In playback mode, long press Mode button, select "Protect", you
will have protect lock options ("lock one" to protect the selected file,
"lock all" to protect all the files on the memory card) and protect
unlock options ("unlock one" to unlock the selected files, "unlock
all" to unlock all the protected files on the memory card).