It’s my understanding that the goggles SD card slot is for playback only, it does not record to an onboard SD card. Weird, but apparently true. You can take the SD card from your drone and insert into the goggles and watch the videos you’ve recorded and if I remember correctly it’ll only playback in 720p.
Someone correct me if I’m wrong. I just got my goggles and haven’t used them yet but I’ve read everything that I could find about them.
It is the only option I have used so far.
But I can recommend p.19 section g) of the DJI Goggles Racing Edition user manual, which is freely available on the net, where video saving to the goggles is described. I just haven’t used this option yet, so I cannot give you proven insight.
Having this same issue. The goggles place a bunch of folders on the mini usb stick so it has to record video there. I did grab the stick from the Mavic Pro and put it in the goggles but you have to copy the files to the folders created by the goggles before you can view them. There's got to be a better way.