cf express

Hello Gang, I am a R6 Mark II owner but I am thinking about moving up to either the Mark III and or R5 or a used R1 for my sport photography. Does anyone recomend a brand and or size. Does anyone know if the 4.0 format is supported? I know Memory is high $ but wanted to ask. I currently...

I purchased CF Express cards for the coming R5, and they arrived over the past few days. Three different types. I did the Black Magic Disk Speed Test to each and thought people might appreciate the results. This test does repeated read/writes to the card to simulate real world video file use...