Best SD Cards For Canon EOS R6 Mark II
Expert recommendations based on Canon EOS R6 Mark III specifications
Recommended Spec
CFexpress Type B + SD UHS-II (V90 or faster)
This is the format change people search for.
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#1 Top Pick for Canon EOS R6 Mark III
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Official Canon EOS R6 Mark III SD Card Requirements
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Format: CFexpress Type B + SD UHS-II
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Minimum Speed: V90 (90 MB/s write)
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Maximum Capacity: CFexpress 8TB, SD no official limit
Why these requirements? This is the format change people search for. The R6 and R6 Mark II had two SD UHS-II slots; the R6 Mark III swaps one of them for CFexpress Type B. The reason is the new 32.5MP sensor and internal 7K/60 12-bit Canon RAW Light, which only records to the CFexpress slot. Everything else, 4K/120, Open Gate 7K/30 in 10-bit MP4 and 40 fps RAW bursts, works on the SD slot, where Canon specifies UHS-II V90. In practice most owners run a CFexpress card for RAW video and relay or backup, and a V90 SD card for stills and compressed video.
Detailed Specifications
Type
CFexpress Type B + SD UHS-II
Min Speed Class
V90
Write Speed
90 MB/s
Recommended Size
256GB, 512GB
Max Capacity
CFexpress 8TB, SD no official limit
Top SD Card Recommendations
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| SD Card | Verified | Speed Class | Write Speed | Pros | Price |
|---|---|---|---|---|---|
ProGrade Digital CFexpress Type B Gold
|
VPG-400 | Up to 3000 MB/s |
|
$$ Check Price | |
SanDisk Extreme PRO CFexpress Type B
|
VPG-400 | Up to 1400 MB/s |
|
$$ Check Price | |
Angelbird AV PRO CFexpress Type B MK2
|
VPG-400 | Up to 1550 MB/s |
|
$$ Check Price | |
SanDisk Extreme PRO SD UHS-II
|
V90 | Up to 260 MB/s |
|
$$ Check Price |
Compare These Cards
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ProGrade Digital CFexpress Type B Gold
$$ · Premium- UHS RatingNone
- Speed ClassVPG-400
- App PerformanceN/A
- Read SpeedUp to 3400 MB/s
- Write SpeedUp to 3000 MB/s
- EnduranceStandard
Available Capacities240GB, 512GB, 1024GB, 2048GB
Pros
- Common choice for Nikon Z8 and Z9 and Canon R5 8K. High sustained writes keep the buffer clear.
Cons
- Costs more than most shooters need for 4K.
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SanDisk Extreme PRO CFexpress Type B
$$ · Premium- UHS RatingNone
- Speed ClassVPG-400
- App PerformanceN/A
- Read SpeedUp to 1700 MB/s
- Write SpeedUp to 1400 MB/s
- EnduranceStandard
Available Capacities64GB, 128GB, 256GB, 512GB
Pros
- A common choice for the Canon R5 and Nikon Z8 and Z9.
Cons
- Runs warm during long 8K recording.
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Angelbird AV PRO CFexpress Type B MK2
$$ · Premium- UHS RatingNone
- Speed ClassVPG-400
- App PerformanceN/A
- Read SpeedUp to 1785 MB/s
- Write SpeedUp to 1550 MB/s
- EnduranceStandard
Available Capacities1024GB, 2048GB, 4096GB
Pros
- Holds its write speed through long cinema takes on the Z8
- Z9 and similar bodies.
Cons
- No capacities under 1TB.
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Kingston Canvas Go Plus 128GB microSD Card | Up to 200MB/s | Class 10, UHS-I, U3, V30, A2 | SDCG4/128GB
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Kingston 128GB Canvas Select Plus microSD Card | Up to 150MB/s | Class 10, UHS-I, U1, V10, A1 | SDCS3/128GB
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Frequently Asked Questions
What SD Card Do I Need for Canon EOS R6 Mark III?
The Canon EOS R6 Mark III takes a CFexpress Type B + SD UHS-II card rated V90 or faster. 256GB or 512GB covers most owners, and the maximum is CFexpress 8TB, SD no official limit. Buy SanDisk, Lexar, Samsung or Kingston from a reputable seller: counterfeit cards are the most common cause of lost files.
Does the R6 Mark III still take SD cards?
Yes, in one slot. Slot 1 is CFexpress Type B and slot 2 is SD UHS-II. Your R6 Mark II cards work in slot 2 for stills and compressed video. Only 7K RAW Light requires the CFexpress slot.
Do I have to buy a CFexpress card?
Only for internal RAW video. Stills, 4K/120 and Open Gate MP4 all record to a V90 SD card. If you never shoot Canon RAW Light, a single V90 SD card is enough.
Is V90 required for Canon EOS R6 Mark III?
Yes. V90 guarantees 90 MB/s of sustained write, which keeps the Canon EOS R6 Mark III free of dropped frames, clips that stop early, or corrupted files. Faster cards work too.
What size SD card should I get for Canon EOS R6 Mark III?
256GB covers light use; 512GB suits heavy use. Maximum capacity: CFexpress 8TB, SD no official limit.
Can I use older or slower cards with Canon EOS R6 Mark III?
Not below V90. Slower cards cause dropped frames, clips that stop early, or corrupted files. Check the card label for the V90 mark.
Do I need a UHS-II card for Canon EOS R6 Mark III?
No, but it helps. The Canon EOS R6 Mark III has a UHS-II slot, so UHS-II cards write and offload faster. UHS-I cards work at UHS-I speed.
Should I use more than one card with Canon EOS R6 Mark III?
For long shoots, yes. Two mid-size cards cost about the same as one large card, and a failure then loses half your files instead of all of them.
Does the brand matter for Canon EOS R6 Mark III?
Yes. SanDisk, Lexar, Samsung and Kingston cards meet their rated speeds. Buy from the brand's store or a major retailer: counterfeit cards sold under those names are common on marketplaces.
What happens if I use the wrong card with Canon EOS R6 Mark III?
A card slower than V90 causes dropped frames, clips that stop early, or corrupted files. A card over the maximum capacity or in the wrong format may not be recognized.
How long will an SD card last in Canon EOS R6 Mark III?
Several years in normal use. Cards usually fail from wear or counterfeit flash, not age. Replace yours at the first write error, corrupted file or "card not recognized" message.