For file-saving convenience, the Canon EOS R3 contains two memory card slots: one CFexpress Type B slot and one UHS-II SD slot. The CFexpress Type B slot should be preferred for 6K video recording and quick continuous filming, while the SD slot is a handy backup option or for less time-critical shooting.
Canon EOS R3 allows for high-resolution 6K raw 12-bit internal recording as well as uncropped 4K 120p 10-bit recording on the Canon EOS R3. The enhanced Dual Pixel CMOS AF II with 1,053 AF Points incorporates advanced EOS iTR tracking for subjects like humans, animals, and select cars and motorcycles down to EV -7.5.
Here are the best memory cards for Canon EOS R3 camera. In this guide, you can find our top recommended & fastest CFexpress cards and SD cards for Canon EOS R3 mirrorless camera.
Best Memory Cards for Canon EOS R3
CFEXPRESS CARDS for Canon EOS R3:
| CFexpress Cards (Type B) | Max. Read Speed | Max. Write Speed | Buy Now |
| Delkin Devices POWER CFexpress Type B Card | 1730 MB/s | 1540 MB/s | Amazon |
| ProGrade Digital Cobalt Series CFexpress Card | 1700 MB/s | 1500 MB/s | Amazon |
| Sony TOUGH CFexpress Memory Card Type B | 1700 MB/s | 1480 MB/s | Amazon |
| Wise Advanced CFX-B Series CFexpress Card | 1700 MB/s | 1550 MB/s | B&H |
| Delkin Devices BLACK CFexpress Type B Card | 1645 – 1760 MB/s | 1400 – 1710 MB/s | B&H |
| ProGrade Digital Gold Series CFexpress Card | 1700 MB/s | 1400 – 1500 MB/s | Amazon |
| SanDisk Extreme PRO CFexpress Card Type B | 1700 MB/s | 1200 – 1400 MB/s | Amazon |
| Hoodman Steel CFexpress Card | 1700 MB/s | 1,400 MB/s | Amazon |
| Lexar Professional CFexpress Type-B Card | 1750 MB/s | 1,000 MB/s | Amazon |
SD CARDS for Canon EOS R3:
| UHS-II SD Cards | Max. Read Speed | Max. Write Speed | Buy Now |
| Sony SF-G Tough UHS-II SD Card (V90) | 300 MB/s | 299 MB/s | Amazon |
| Kingston Canvas React Plus UHS-II SD Card (V90) | 300 MB/s | 260 MB/s | Amazon |
| ProGrade Digital UHS-II SDXC Card (V90) | 300 MB/s | 250 MB/s | Amazon |
| Delkin Devices Power UHS-II SDXC Card (V90) | 300 MB/s | 250 MB/s | Amazon |
| Delkin Devices BLACK UHS-II SDXC Card (V90) | 300 MB/s | 250 MB/s | B&H |
| Lexar Professional 2000x UHS-II Card (V90) | 300 MB/s | 260 MB/s | Amazon |
| SanDisk Extreme PRO UHS-II SD Card | 300 MB/s | 260 MB/s | Amazon |
| Hoodman Steel 2000x SDXC UHS-II Card | 300 MB/s | 260 MB/s | B&H |
| Sony SF-M Tough UHS-II SDXC Card (V60) | 277 MB/s | 150 MB/s | Amazon |
| ProGrade Digital UHS-II SDXC Card (V60) | 250 MB/s | 130 MB/s | Amazon |
| Sony SF-E Series UHS-II SDXC Card (V60) | 270 MB/s | 120 MB/s | Amazon |
| Lexar Professional 1667x UHS-II SD Card (V60) | 250 MB/s | 90 MB/s | Amazon |