The CGO3 4K camera on my Typhoon has a micro SD slot and uses the microSD to record the inflight video and photos.
Is there not a microSD slot somewhere on your CGO3?
Also found this on horizon hobby's website
"According to Cory at Horizon Hobby Tech Support, you can access the microSD card directly from your computer by connecting a USB-A to MicroUSB cable into the MicroUSB port on the camera, located directly beside the microSD card slot on the CGO3 camera. Should be no need to remove the card from the camera. Hope this is helpful, "