Canon EOS R Card Slots: Complete List 2026

The Canon EOS R, Canon's trailblazing full-frame mirrorless, features dual card slots for pro reliability. This 2026 list details specs, compatibilities, and best cards to safeguard your 45MP masterpieces and 4K footage.

Slot 1: CFexpress Type B

Primary slot for ultimate speed.

  • Max Speed: 2000MB/s read
  • Capacity: Up to 4TB in 2026
  • Ideal For: 8K RAW bursts

Slot 2: SD UHS-II

Backup with broad accessibility.

  • Speed: 312MB/s max
  • Supports: SD/SDHC/SDXC
  • Great For: Extended video

Dual Slot Benefits

Redundancy and flexibility.

  • Auto overflow or mirror modes
  • Simultaneous JPEG/RAW
  • Mix media types

Top CFexpress Cards

2026 recommendations.

  • Angelbird 660GB AV Pro: Best value
  • Delkin BLACK 1TB: Durable
  • SanDisk 800GB Extreme Pro

Top SD Cards Pairing

Match with Slot 2.

  • Lexar Silver Plus 256GB
  • Kingston Canvas React 128GB
  • Samsung Pro Plus 512GB

Formatting and Maintenance

Essential care.

  • In-camera format only
  • Clean slots quarterly
  • Firmware updates key

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