Any idea why my Canon R6II won’t record video to a Prograde V90 SD card?

[colenvo1]

I’m having a confusing issue. I have a several Prograde UHS-II 256GB V90 SD cards that I use in my Canon C70. When I put them in my R6II and format them, the camera will take stills and record to card, but when I try to record video it says “No card in camera” and has the timer numbers in red. What gives? It’s plenty fast to record 4K24.

[NatalyaP]

Greetings colenvo1,

Let's check to see if the camera has been set up to record photos and videos to separate cards. You may click on the following link to view information on how this can be changed within the camera's menu.

Canon : Product Manual : EOS R6 Mark II : Selecting Cards for Recording/Playback (start.canon)

For the first option where it shows to whether or not record photos and videos separately, we can see if it's "Enabled". This would indicate that the camera will record videos to Card 2 and would provide an error if there is only a card in Slot 1.