canon r3 card slots
Best Memory Cards for Canon EOS R (SD Card Recommendations)
The Canon EOS R has an SD card that works with SD/SDHC/SDXC memory cards.
Nikon D750 Review & Sample Images by Ken Rockwell
Camera SD Memory Card Slot for Canon EOS 6D2 77D 100D 750D 760D 800D 3000D Part.
Best Memory Card for Canon EOS 5D Mark IV - Canon Rumors CO
So, the Canon EOS 5D Mark IV has two memory card slots: 1x CompactFlash memory card slot (UDMA 7 compatible) and 1x SD memory card slot with UHS-I support.