KeepGuard KG Series Instruction Book page 11

Settings
Format SD Card
Format SD Card
Set
OK
Default Settings
Default Settings
Set
OK
Version KG762 160830A
Set
OK
Execute
Exit
MENU
Execute
Exit
MENU
Version
Exit
MENU
KEEPTIME
Deletes (erases) all files stored on a card to prepare it for
reuse. Always format a card that has been previously used in
other devices. Caution! Make sure you have downloaded and
backed up any files you want to preserve first! Press OK to
execute, press MENU (or select NO then press OK) to exit
without formatting.
Select"Execute"and press OK to restore all parameters to
the original factory default settings.