Medion LIFE X44038 Mode D'emploi page 218

NOTE!
Protected files cannot be deleted. In this case, the
message "FILE LOCKED" appears on the display.
If a memory card is inserted, you can only delete the
files on the memory card.
If the memory card is locked, you will not be able to
delete the files on the memory card.
You cannot restore a file that has been deleted. You
should therefore exercise caution when deleting
files.