Expand the potential of every shoot with the large capacity storage of the EOS R3 with dual card slots . The memory card slots support the latest-generation CFexpress Type-B card and SD card .
A CFexpress card allows for hyper-fast data transfers from camera to card , with sufficient camera buffer for efficient recording of 6K RAW movies and images at the burst speed of up to 30 fps . It is now possible to record identical MP4 data in 4K or FHD quality on both cards simultaneously for safety backup . When recording RAW movie on the CFexpress card , it is possible to record similar data in 4K format on the SD card .