SanDisk
SanDisk 64G_SD_Extreme_Pro_R6 Extreme Pro SDXC Card for Canon EOS R
★★★★★
4KUHD
200MB/s read and 90MB/s write speeds let this 64GB SanDisk Extreme Pro handle 4K UHD capture and rapid post-shoot transfer without becoming your workflow's bottleneck.
$18.22*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
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Overview
Key Features
Bundle includes (1) SD Extreme Pro memory card and (1) Everything But Stromboli Combo Card Reader.
The card of choice for professionals who need efficiency and speed in post-production
Compatible with Canon EOS R, M50, M100, Mirrorless Camera
Can read speeds of up to 200MB/s speed. Write speeds of up to 90MB/s
UHS speed Class 3 (U3) and video speed Class 30 (V30) for 4K UHD video
Specifications
Brand
SanDisk
Model
Extreme Pro SDXC Card
Storage Capacity
64 GB
Read Speed
Up to 200 MB/s
Write Speed
Up to 90 MB/s
UHS Speed Class
U3
Video Speed Class
V30
Video Recording Support
4K UHD
Included Accessory
Everything But Stromboli Combo Card Reader
Compatibility
Canon EOS R, M50, M100, Mirrorless Camera
Pros & Cons
👍 Pros
- 200MB/s read speed significantly accelerates post-shoot file transfer from card to computer, reducing downtime between shooting sessions and editing start.
- V30 and U3 dual speed class certification guarantees the minimum 30MB/s sustained write floor required for reliable 4K UHD video recording without dropped frames.
- 64GB capacity provides approximately double the recording time of a 32GB card — a meaningful buffer for shooting days that run longer than planned.
- Verified compatibility with Canon EOS R, M50, and M100 removes the guesswork from card selection for Canon mirrorless users.
- Included combo card reader adds immediate post-production workflow utility without requiring a separate card reader purchase.
👎 Cons
- UHS-I bus architecture caps theoretical maximum speed below UHS-II alternatives — cameras with UHS-II slots (like Nikon Z series) will not see the Extreme Pro's full speed advantage.
- 90MB/s rated write speed is the maximum, not guaranteed sustained throughput — prolonged high-bitrate recording sessions may see real-world write speeds lower than the rated ceiling under thermal load.
- 64GB capacity remains insufficient for full-day 4K cinema RAW workflows — professional video productions requiring multiple hours of uninterrupted 4K capture will need multiple cards.
- The included Everything But Stromboli reader is a third-party accessory, not a SanDisk product — read/write speeds through the reader depend on the reader's USB bandwidth, not the card's rated speed.
- SDXC format compatibility requires SDXC-capable devices — older cameras with SDHC-only slots cannot use this 64GB card.
Frequently Asked Questions
What is the actual performance difference between the Extreme Pro and the standard SanDisk Extreme at 64GB?
The Extreme Pro is rated at 200MB/s read and 90MB/s write versus the standard Extreme's 160MB/s read and 90MB/s write. Write speeds are identical at the rated maximum, meaning in-camera 4K recording performance is comparable. The Extreme Pro's advantage is the higher read speed, which translates to faster file offload to a computer during post-production — relevant when you're transferring large RAW and 4K video files after a shoot.
Does this card support 4K UHD video recording, and which speed class ratings does it carry?
Yes. The card is rated V30 (Video Speed Class 30) and U3 (UHS Speed Class 3), both of which certify a minimum 30MB/s sustained write throughput — the baseline required for 4K UHD video recording. The 90MB/s maximum write rating provides headroom above that floor for higher-bitrate codecs and burst photo capture.
Is this card compatible with the Canon EOS R mirrorless camera specifically?
Yes, compatibility with the Canon EOS R, M50, and M100 is explicitly confirmed. The EOS R uses a standard full-size SD card slot with UHS-I support — this card operates within that specification. The EOS R does not support UHS-II, so the Extreme Pro's UHS-I bus is matched to the camera's capabilities with no speed penalty.
What does the included Everything But Stromboli combo reader do, and is it a useful addition?
The combo reader is a USB card reader that accepts multiple memory card formats. It allows you to transfer files from the SD card to your computer without relying on a camera USB tethering connection — faster and less wear on your camera's USB port. It is a practical accessory for post-shoot workflow, particularly if your laptop lacks a built-in SD card reader.
How much 4K video will 64GB hold, and is it sufficient for a full day's shoot?
At 4K UHD recording bitrates typical of Canon mirrorless cameras (approximately 480Mbps for Canon Cinema RAW Light, or roughly 150–200Mbps for standard MP4), 64GB holds approximately 40–60 minutes of high-bitrate or 60–90 minutes of standard 4K video. For a structured shoot day with planned takes and monitoring of card capacity, 64GB is manageable. For continuous event or documentary recording, carry two or more cards.
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