Best Memory Cards for Canon EOS M5 Mark II
Finding the right memory card for your Canon EOS M5 Mark II can be surprisingly tricky. While the camera is a powerhouse for street photography and vlogging, using a slow, outdated card will lead to frustrating “buffer full” messages during burst shooting or dropped frames in 4K video. I’ve tested dozens of SD cards to find the sweet spot between speed and price. For most users, the SanDisk Extreme Pro remains the gold standard for reliability and consistent performance.
Our Top Picks at a Glance
Best Memory Cards for Canon EOS M5 Mark II: Detailed Reviews
SanDisk Extreme Pro UHS-I View on Amazon View on B&H
The SanDisk Extreme Pro is the quintessential choice for any Canon M-series user. Since the M5 Mark II utilizes a UHS-I card slot, you don’t need to spend extra on expensive UHS-II cards; instead, you want the fastest UHS-I card available. With read speeds up to 200MB/s and write speeds of 140MB/s, this card handles the camera’s 10fps burst rate with ease. I’ve found that even when shooting raw+JPEG, the buffer clears significantly faster than with standard “Gold” SanDisk cards. It is V30 rated, meaning it guarantees a minimum 30MB/s sustained write speed, which is plenty for the M5 Mark II’s 4K video bitrates. The only real downside is that its top speeds require a proprietary SanDisk reader to achieve on a PC, but in-camera, it is flawlessly efficient and incredibly durable against temperature and shock.
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Samsung PRO Plus SD View on Amazon View on B&H
Samsung has dominated the microSD market for years, and their full-sized PRO Plus SD cards are equally impressive. For the Canon EOS M5 Mark II, the PRO Plus offers a fantastic value proposition, often retailing for less than the SanDisk equivalent while offering nearly identical real-world performance. It features read speeds of 180MB/s and write speeds up to 130MB/s. In my testing, I noticed that this card stays remarkably cool during extended 4K recording sessions, which is a bonus for the compact M-series bodies that can sometimes struggle with heat. It’s also “7-proof,” meaning it’s resistant to water, extreme temperatures, X-rays, and even magnets. If you want professional-grade reliability without paying the “brand tax” often associated with photography-first companies, this blue card is a stellar choice for your daily carry.
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Lexar Professional 1066x View on Amazon View on B&H
The Lexar Professional 1066x is the go-to card for photographers who want reliable high-speed performance without breaking the bank. While Lexar has had its ups and downs as a company, the 1066x series has proven to be a workhorse for UHS-I cameras like the M5 Mark II. It offers read speeds up to 160MB/s, which makes transferring a day’s worth of photos to your laptop a breeze. While its write speeds (up to 120MB/s) are slightly lower than the SanDisk Extreme Pro, you likely won’t notice the difference unless you are pinning the shutter for extended high-speed bursts. It handles 4K video perfectly thanks to its V30 rating. This is an ideal “spare card” to keep in your bag, or a primary card for those who prefer to spend their money on a nice EF-M 22mm prime lens instead.
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Kingston Canvas Go! Plus View on Amazon View on B&H
Kingston has really stepped up their game with the Canvas Go! Plus. While it might not have the marketing “cool factor” of SanDisk or Sony, its performance in the Canon EOS M5 Mark II is flawless. It is specifically designed for users on the go, with a focus on high-bitrate video capture and rapid-fire photo bursts. With read speeds of 170MB/s and write speeds of 90MB/s, it hits the maximum throughput the M5 Mark II can handle. I often recommend Kingston to professionals who need absolute reliability for paid gigs; they have a very low failure rate in my experience. It is fully V30 compliant and works excellently for the M5 Mark II’s time-lapse and high-speed video modes. If you’re planning a trip where you won’t have the chance to back up your photos daily, the reliability of this Kingston card provides significant peace of mind.
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PNY Elite-X60 View on Amazon View on B&H
The PNY Elite-X60 is a solid alternative for those who need a high-capacity card (like 256GB or 512GB) without the massive price tag. While its read and write speeds are technically a bit slower than the top-tier SanDisk or Samsung offerings, it still comfortably exceeds the requirements for the Canon M5 Mark II. I find this card particularly useful for vloggers who record long takes and don’t want to swap cards mid-shoot. It maintains a steady V30 rating, ensuring your 4K video won’t cut out unexpectedly. The build quality feels slightly more “plastic-y” than the premium Kingston or SanDisk cards, but as long as you aren’t constantly prying it in and out of the slot with force, it will last for years. It’s a pragmatic, no-nonsense choice for the everyday photographer who values quantity and consistent performance.
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Buying Guide: How to Choose Memory Cards
Comparison Table
| Product | Best For | Rating | Price |
|---|---|---|---|
| SanDisk Extreme Pro | Daily Professional Use | ★★★★★ | Check |
| Samsung PRO Plus | Value and Durability | ★★★★☆ | Check |
| Lexar Professional | Budget-Conscious Users | ★★★★☆ | Check |
| Kingston Canvas Go! | Rugged Travel | ★★★★★ | Check |
| PNY Elite-X60 | Massive Storage | ★★★★☆ | Check |
Frequently Asked Questions
Can I use UHS-II cards in the Canon M5 Mark II?
Yes, you can physically use UHS-II cards in the camera as they are backwards compatible. However, the M5 Mark II only has a UHS-I interface. This means the card will operate at UHS-I speeds, and you won’t see the 300MB/s+ performance you paid for. It’s generally better to save your money and buy a high-end UHS-I card instead.
How much 4K video can a 128GB card hold?
The Canon EOS M5 Mark II records 4K video at a bitrate of approximately 120Mbps. On a 128GB card, you can expect to store about 130 to 140 minutes of 4K footage. If you shoot primarily in 1080p, that capacity jumps to over 5 hours. For most weekend trips, a single 128GB card is sufficient, but vloggers should carry a spare.
What does the “V30” rating actually mean?
V30 stands for Video Class 30, which guarantees that the card can maintain a minimum sustained write speed of 30MB/s. This is crucial for video recording because if the write speed drops for even a second, the camera will stop recording and display an error. Always ensure your card has the V30 logo for 4K video work.
Is it better to have one large card or two smaller ones?
Many professional photographers prefer having two 64GB or 128GB cards rather than one giant 512GB card. This is known as “eggs in one basket” logic. If one card fails or gets lost, you haven’t lost your entire shoot. However, modern cards from reputable brands like SanDisk are extremely reliable, so a single large card is usually fine for hobbyists.
Why does my camera say “Card Protected”?
This is almost always due to the tiny physical lock switch on the side of the SD card. If that switch is toggled down, the card becomes read-only, and the camera cannot save photos to it. Simply slide the switch back up toward the connectors to unlock it. If it still says protected, the card may have a file system error and need formatting.
Final Verdict
For the majority of Canon EOS M5 Mark II owners, the SanDisk Extreme Pro 128GB is the smartest investment you can make to ensure your hardware isn’t bottlenecked. If you are a casual shooter who mostly takes family photos and the occasional 1080p clip, the Lexar or Samsung options will save you a few dollars without sacrificing quality. Always remember to format your card in-camera before a big shoot to ensure the best possible performance!