Vantrue OnDash N1 Pro User Manual page 17

Note: The camera will auto overwrite old Event videos once the Event
folder has accumulated 30% of the card capacity. Please regularly
transfer important videos to your PC or another storage location
(e.g. external hard drive). To maintain good read/write performance,
the MicroSD card should be formatted every 1-2 weeks.
4.7 Audio recording
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