Best Memory Card for Canon EOS M5 Mark II
Finding the right storage for your Canon EOS M5 Mark II can be the difference between capturing a perfect 4K sequence and staring at a “Busy” light while your subject walks away. Whether you’re pushing the 14fps burst rate or filming high-bitrate video, standard SD cards often bottleneck this mirrorless powerhouse. After testing dozens of cards in real-world shoots, I’ve identified the top performers that eliminate buffer lag without draining your wallet, starting with our favorite all-rounder from SanDisk.
Our Top Picks at a Glance
Best Memory Cards for Canon EOS M5 Mark II: Detailed Reviews
SanDisk Extreme Pro UHS-II View on Amazon View on B&H
If you want to unlock the full potential of your Canon EOS M5 Mark II’s continuous shooting mode, the SanDisk Extreme Pro UHS-II is the gold standard. With write speeds hitting up to 260MB/s, this card clears the camera’s buffer almost instantly, even when firing off RAW+JPEG frames. I’ve found that during sports photography, where every millisecond counts, this card prevents that frustrating lock-up that slower cards suffer from. It carries a V90 rating, meaning it’s overkill for the M5 Mark II’s 4K video requirements, but that extra headroom ensures zero dropped frames. The only real downside is the price; it’s a premium investment. However, for reliability and speed, SanDisk remains the brand I trust most when I’m on a paid assignment. It’s shockproof, temperature-proof, and comes with a lifetime limited warranty for peace of mind.
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Lexar Professional 1667x UHS-II View on Amazon View on B&H
The Lexar Professional 1667x is arguably the smartest buy for the Canon EOS M5 Mark II. It utilizes the UHS-II interface to provide significantly faster speeds than standard cards, yet it’s priced closer to high-end UHS-I cards. With a 250MB/s read speed, transferring your weekend’s photos to your computer is remarkably fast. In-camera, the V60 rating ensures it can handle any video mode the M5 Mark II throws at it, including 4K at high bitrates. I noticed that while it isn’t quite as snappy as the SanDisk V90 cards for extreme burst shooting, it’s a massive upgrade over basic SD cards. The build quality feels solid, though some users have noted the plastic casing can be slightly less durable than Sony’s TOUGH series. For the price-to-performance ratio, you simply cannot beat this Lexar card for everyday enthusiast use.
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Kingston Canvas Go! Plus View on Amazon View on B&H
Not everyone needs professional-grade UHS-II speeds, and for those users, the Kingston Canvas Go! Plus is a fantastic, reliable choice. This is a UHS-I card, but it pushes the limits of that technology with read speeds up to 170MB/s. It is V30 rated, which is the minimum requirement for stable 4K video on the Canon EOS M5 Mark II, making it a safe choice for vloggers on a budget. In my testing, it handles single-shot photography and short bursts perfectly fine. However, you will notice the camera taking several seconds to clear the buffer after a long continuous burst. If you primarily shoot landscapes, portraits, or family vacations where you aren’t “spraying and praying” at 14 frames per second, this card offers incredible reliability for a fraction of the cost of UHS-II alternatives. It’s a “set it and forget it” card that won’t let you down.
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Sony TOUGH-G series SDXC View on Amazon View on B&H
If you are the type of photographer who takes your Canon EOS M5 Mark II into dusty, wet, or rugged environments, the Sony TOUGH-G series is built specifically for you. Unlike traditional SD cards that can crack or lose their write-protect switch, the TOUGH series uses a one-piece molded design that is virtually indestructible. Performance-wise, it’s a beast, offering 299MB/s write speeds that make buffer lag a thing of the past. I’ve dropped these in the mud and simply rinsed them off—they are that resilient. While the M5 Mark II doesn’t *require* this level of physical durability, it provides immense confidence if you’re traveling solo or shooting in unpredictable weather. You are paying a significant premium for the build quality and the V90 speed rating, but for many, the “insurance” of a card that won’t physically fail is worth every penny.
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Samsung PRO Plus View on Amazon View on B&H
The Samsung PRO Plus is a stellar alternative to the SanDisk Extreme series, often found at a slightly lower price point. It’s a UHS-I card, but Samsung’s flash technology is world-renowned for its longevity. With write speeds up to 120MB/s, it handles the M5 Mark II’s 4K video flawlessly and provides a decent experience for moderate burst shooting. What I really appreciate about Samsung cards is their “7-proof” protection, covering everything from seawater to X-rays and wear-out. This makes it an ideal card for travelers who are constantly moving through airports and different climates. It’s not as fast as the UHS-II options on this list, but for 90% of photography needs, it’s a rock-solid performer. If you want a brand-name card with a great reputation for data integrity, the PRO Plus is a very safe bet for your Canon mirrorless system.
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Buying Guide: How to Choose a Memory Card for Your Canon
Comparison Table
| Product | Best For | Rating | Price |
|---|---|---|---|
| SanDisk Extreme Pro UHS-II | High-Speed Action | ★★★★★ | Check |
| Lexar Professional 1667x | Daily Enthusiast | ★★★★☆ | Check |
| Kingston Canvas Go! Plus | Budget/Casual | ★★★★☆ | Check |
| Sony TOUGH-G series | Rugged Use | ★★★★★ | Check |
| Samsung PRO Plus | Travel/Reliability | ★★★★☆ | Check |
Frequently Asked Questions
Does the Canon EOS M5 Mark II support UHS-II?
Yes, the M5 Mark II (like its sibling the M6 Mark II) features a UHS-II compatible slot. While you can use older UHS-I cards, you won’t get the fastest possible buffer clearing speeds. Using a UHS-II card is highly recommended if you plan on using the high-speed burst modes or want to transfer your files to a computer quickly using a UHS-II card reader.
What capacity is best for 4K video?
For 4K video, I recommend a minimum of 128GB. A 64GB card can hold roughly 40-60 minutes of 4K footage depending on the bitrate, which can disappear quickly during a day of shooting. 128GB provides a comfortable safety net, allowing you to record video and snap plenty of high-resolution RAW photos without constantly checking your remaining storage space.
Is there a difference between SDHC and SDXC?
The main difference is the file system and capacity. SDHC cards range from 4GB to 32GB, while SDXC cards range from 64GB up to 2TB. More importantly, SDXC cards use the exFAT file system, which allows for individual files larger than 4GB. This is essential for long video clips, making SDXC the preferred choice for modern mirrorless cameras.
Can I use a MicroSD card with an adapter?
Technically, yes, but I don’t recommend it for high-performance cameras like the M5 Mark II. Every extra connection point (the adapter pins) is a potential point of failure. While it works for casual shots, the adapter can often bottleneck the speed of the MicroSD card, leading to slower buffer clearing or errors during high-bitrate video recording. Stick to full-sized SD cards.
What does the “V30” or “V60” mean?
These are Video Speed Classes. V30 means the card can maintain a minimum sustained write speed of 30MB/s, V60 is 60MB/s, and so on. For the M5 Mark II, V30 is the minimum requirement for 4K. If you choose a card with a higher rating like V60 or V90, you’re essentially future-proofing your storage for cameras with even higher bitrates.
Final Verdict
For the vast majority of users, the **Lexar 1667x** provides the perfect balance of price and speed, unlocking the M5 Mark II’s potential without the professional price tag. If you are shooting fast-paced action or sports, the **SanDisk Extreme Pro UHS-II** is a necessity to keep your buffer clear. Casual shooters who mostly take family photos can save money with the **Kingston Canvas Go! Plus** and still enjoy great results.