I only have the Mavic 2 Pro with the old Smart controller. However, if the 4 is like mine, then the controller only stores low res. images, to give you an idea of what you recorded using the drone.
It is the Micro SD card or the internal storage...
Forget the controller.
The original image files are saved to the SD card in your drone or the internal storage in the drone.
It quick and simple to either pop the card, put it in a $3 USB adapter and put that in your computer ...
or
For internal...
You are a legend!!! i really should have just plugged the usb-c cable directly into the drone. Your exactly right. just checked and that is exactly where the files are stored. I also have the Mavic Pro 2 and used to use a micro SD card, just I...