See Device storage > DJI > dji.pilot > RECORD_VOICE

Is there an app feature that makes use of this?

No, there's no mic on Phantom planes.

I think it's just a file left for possible future use.

Hello Airspace Explor，currently this folder doesn't store anything.

Seems to suggest that it will record sound from device at some point in future, to be overlaid on video ?

Or to capture the atmos' ......."Oh damn there goes a prop"

DJI-Paladin Posted at 2016-6-8 01:01
Hello Airspace Explor，currently this folder doesn't store anything.

That I already know.

I was wondering if there is a feature I had overlooked.

And we've all seen the DJI_SPALSH folder, right?