Panasonic WJ-HD616K Operating Instructions Manual page 120

Step 5
Select "NML rec." or "EVT rec." for "Data delete", and
then set the time and date.
Images recorded until the day before the set date are
subject to deletion.
Step 6
Click the [Execute] button.
→ The confirmation window will be displayed.
Step 7
Click the [OK] button.
→ Images recorded until the day before the set date
will be deleted.
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