To prevent a file from being accidentally erased or edited, you can protect an important file. A protected file is marked with the
(protect) indicator and is regarded as a read-only file you cannot erase or edit.
tab or the
tab.
tab - “Protect,” and then press
.

“Set Protection?” appears on the display.
or
to select “Execute,” and then press
.
(protect) indicator.
STOP to exit the menu mode.
.