Panasonic WJ-HD309A Network Operating Instructions page 52

Screenshot 3
The setup menu (Advanced) will be displayed.
Screenshot 4
The [Maintenance] submenu will be displayed in the
[Setup] tab.
[Maintenance] submenu
Screenshot 5
The [Data Delete] menu will be displayed.
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Step 3
Click the [Maintenance] button.
Step 4
Click "Data Delete".
Step 5
Set the time and date for "Manual Delete for the normal
recording area" or "Manual Delete for the event record-
ing area".
Images recoded before the set time and date will be
deleted.
Step 6
Click the [DELETE] button.