I have a micro SD card and a normal SD card which runs on the SD 4.0 specification, allowing high data transfer speeds. I also have a 5D Mark IV, which unfortunately only supports the UHS-I protocol in its SD card slot. It has a CF card that can support much higher data transfer speeds (allowing for better bust mode photo saving), but it is not compatible with my SD/micro SD cards.
Is there any sort of CF to SD or CF to micro-SD adapter which supports SD 4.0 speeds?
Here is a link to an adapter on Amazon. It only supports UHS-I/SD 3.0 and doesn't supports cards over 32GB. My cards are 64GB or 128GB.
Here is another one that only supports SD 3.0.
The others I've seen only supports SD 3.0 speeds as well.