There are no factory settings to reset. When selling a DJI drone:
- Reformat the SD card if you are providing it with the drone.
- Remove your FAA ID number from the outside of the drone.
- If the drone is registered under Part 107, you need to go to Drone Zone and delete the registration.
- If you are selling your tablet/phone along with the drone, then log out of your account on DJI Go.
Pretty easy.