True, but only when using the Kingston ones.
All my other sd cards appear to work fine except some Kingston Canvas Select I own. They record fine at low/medium quality, but as long as I set to high quality the air unit reports “sd card too slow” and stops the recording in one second.
For whatever reason, kingstons are not for me.
The video I uploaded was recorded on a Sandisk Extreme I have.
I only use sandisk extreme pro - the cost (in the overall scheme of things) is negligible and the reliability is legendary
My old Geforce GTX 970 suddenly died today.
I am running GPUless at the moment, but guess what…
The 120 fps video plays smoothly now
It sounds like the speed of the SD card, try using faster SD cards such as the Sandisk Extreme, v30. Modern cameras (including drones) need high speed cards to write files quickly, without causing buffering issues.
I have the same issue with Kingston Canvas Go Plus 128 GB SD card on DJI O4 Pro. It works in DJI goggles 3 but fails to record when is in air unit. I bougth 2 cards from electronics shop in my country expecting to be good as recommended. Currently I have 3 of them and all acts the same. Almost always throws error “Storage error. Recording will stop soon” on device arming. When try to start recording from goggles manually it throws storage error and after few tries asks to format because messing file system. Tried much slower Transcend high endurance 32Gb card and started recording without issues no matter if displays “Card slow”. I tried to format in PC, goggles, and Air unit itself it just dont cares. So be aware. This was the last Kingston for me, I had been burned few times with other “high end” products. enough. Shame on DJI to recomend this shit in documentation.
Hi @noca, it looks as though you’re quite new here 
Why not nip over to the Introductions page, and say hello properly and tell us a bit about yourself. 