Can’t really see how it can affect drones range if I’m being honest. As I said, I’m pretty sure it’s just a feature on the phone to dump some of the live feed to the phone storage.Actually I don't know how it works exactly, but from observing how my drone behave when it's enabled, I can say it does affect range and general stability of the video link. (this is on MM, it might behave different with eg a MA2)