Best Memory Cards for Canon EOS 6D Mark II
Nothing kills the creative flow like seeing that dreaded “Busy” signal on your Canon EOS 6D Mark II’s top LCD while the buffer struggles to clear. While this full-frame beast is a workhorse for weddings and landscapes, its single UHS-I slot means your choice of SD card is critical for performance. I’ve tested dozens of cards in this specific body, and for most shooters, the SanDisk Extreme Pro remains the gold standard for reliable, hitch-free shooting.
Our Top Picks at a Glance
Best Memory Cards for Canon EOS 6D Mark II: Detailed Reviews
SanDisk Extreme Pro UHS-I View on Amazon View on B&H
If you ask any professional photographer what’s in their bag, nine times out of ten, it’s a SanDisk Extreme Pro. For the Canon 6D Mark II, this card is the perfect match. Since the camera’s hardware is limited to UHS-I speeds, buying anything more expensive for “in-camera” use is overkill. I’ve found that this card handles the 6.5 fps burst rate of the 6DII without breaking a sweat, clearing the buffer much faster than standard Class 10 cards. With write speeds up to 140MB/s, you won’t be left waiting after a long sequence of RAW files. It’s also incredibly durable—I’ve used these in freezing rain and desert heat without a single file corruption. The only minor drawback is that there are many counterfeits online, so always ensure you’re buying from a reputable seller like Amazon directly or B&H.
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Samsung PRO Plus SD View on Amazon View on B&H
Samsung recently refreshed their SD card lineup, and the PRO Plus is a absolute gem for value seekers. While Samsung is famous for microSD cards, their full-sized SD cards are just as impressive. You’re getting read speeds of 180MB/s and write speeds of 130MB/s, which virtually maxes out the 6D Mark II’s interface capabilities. What I love about this card is the “7-proof” protection—it’s resistant to water, extreme temperatures, X-rays, and even magnetic fields. This makes it my top recommendation for travel photographers who are constantly on the move. You’ll notice that the price-to-performance ratio is slightly better than SanDisk, often giving you more gigabytes for your dollar. It’s a reliable, modern card that feels substantial in the hand and performs flawlessly for both 26MP stills and 1080p video recording.
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Kingston Canvas Select Plus View on Amazon View on B&H
If you’ve spent all your money on the 6D Mark II body and a nice L-series lens, you might be looking to save a few bucks on media. The Kingston Canvas Select Plus is surprisingly capable for its price point. While it doesn’t boast the blistering write speeds of the Extreme Pro, it is rated at Class 10 UHS-I, which is the baseline requirement for the 6D Mark II. For everyday photography—portraits, family gatherings, or slow-paced street photography—this card is more than enough. I’ve used Kingston cards for years as backups, and their lifetime warranty provides genuine peace of mind. The limitation comes during heavy continuous shooting; if you hold the shutter down for a 20-shot burst, you will have to wait several seconds for the buffer to clear compared to our top picks. Still, for the price of a latte, you can’t complain.
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Lexar Professional 1667x UHS-II View on Amazon View on B&H
Now, here is a bit of “insider” advice: even though the Canon 6D Mark II only has a UHS-I slot, I often recommend the Lexar Professional 1667x UHS-II card. Why? Because your camera isn’t the only device that handles your photos. When you’re sitting down after a long wedding or a day of wildlife shooting with 64GB of data, a UHS-II card will transfer files to your computer up to three times faster than a UHS-I card (provided you have a UHS-II reader). It’s backward compatible, so it works perfectly inside the 6DII at the camera’s max speed, but it saves you massive amounts of time during the post-production ingest. It’s also V60 rated, meaning if you ever upgrade to a newer Canon body like the R6 Mark II, this card will be ready to handle high-bitrate 4K video. It’s an investment in your total workflow, not just the camera.
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PNY Elite-X Class 10 View on Amazon View on B&H
PNY is a brand that often flies under the radar, but the Elite-X series is highly reliable for Canon DSLR users. I find this card particularly useful when I need high capacity (like 256GB) without the premium price tag of SanDisk. It carries a V30 rating, which ensures a minimum sustained write speed of 30MB/s—plenty for the 6D Mark II’s 1080p/60fps video and burst photography. In my testing, the PNY cards have been surprisingly resilient to physical wear; the plastic casing doesn’t seem to crack as easily as some cheaper competitors. If you’re a “set it and forget it” photographer who likes to keep one high-capacity card in the camera for weeks of shooting, the PNY Elite-X is a fantastic, dependable workhorse that won’t let you down during a critical shoot.
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Buying Guide: How to Choose Memory Cards for the 6D Mark II
Comparison Table
| Product | Best For | Rating | Price |
|---|---|---|---|
| SanDisk Extreme Pro | Pro Reliability | ★★★★★ | Check |
| Samsung PRO Plus | Value/Travel | ★★★★☆ | Check |
| Kingston Canvas | Budget | ★★★★☆ | Check |
| Lexar 1667x | Workflow Speed | ★★★★★ | Check |
| PNY Elite-X | Bulk Storage | ★★★★☆ | Check |
Frequently Asked Questions
Does the 6D Mark II support UHS-II cards?
Yes, the 6D Mark II is backward compatible with UHS-II cards. However, the camera slot itself is only UHS-I. This means you won’t see any speed improvements while shooting photos or video in the camera. The only real benefit of using a UHS-II card is that you can transfer your files from the card to your computer much faster using a dedicated UHS-II card reader, which is great for high-volume shoots.
How many photos can a 64GB card hold on the 6DII?
The 6D Mark II produces RAW files that are roughly 30MB to 35MB each. A 64GB card will typically hold around 1,500 to 1,800 RAW images. If you are shooting in JPEG Large, you can expect to fit over 6,000 images. For most hobbyists, a 64GB card is the “sweet spot,” while professional wedding photographers often prefer 128GB or 256GB cards to avoid swapping media during the ceremony.
Is a V30 card necessary for 1080p video?
While the 6D Mark II doesn’t shoot 4K video (it’s limited to 1080p at 60fps), a V30 card is still highly recommended. V30 guarantees a minimum sustained write speed of 30MB/s, which is more than enough for the 6DII’s maximum video bitrate. Using a slower card can occasionally lead to video recording stopping unexpectedly, especially if the card is nearly full or fragmented. It’s cheap insurance for your video projects.
Can I use a microSD card with an adapter?
Technically, yes, you can use a microSD card in an adapter, but I generally advise against it for a full-frame camera like the 6DII. Every extra connection point (the pins between the card and the adapter) is a potential point of failure. microSD adapters are often flimsy and can cause “Card Error” messages at the worst possible times. Stick to full-sized SD cards for the best reliability and physical durability.
Why is my camera showing “Busy” when I take bursts?
The “Busy” message appears when the camera’s internal buffer is full and it’s waiting to write those files onto the SD card. If you’re using an older or slower SD card, this process takes much longer. Upgrading to a card with a high write speed (like the SanDisk Extreme Pro) will clear that buffer significantly faster, allowing you to resume shooting much sooner after a high-speed burst of action.
Final Verdict
For the vast majority of Canon 6D Mark II owners, the SanDisk Extreme Pro is the only card you’ll ever need—it’s fast, reliable, and reasonably priced. If you’re a professional who hates waiting for file transfers, the Lexar 1667x UHS-II is worth the premium for the workflow speed alone. Casual shooters will find the Samsung or Kingston options perfectly adequate for day-to-day photography without overspending on features the camera can’t fully utilize.