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CFexpress has replaced CFast and older CompactFlash as the standard for high-bandwidth photography and video, but the Type A vs Type B decision starts with your camera, not the card. If you're still deciding whether to move beyond SD, our guide to the best SD and memory cards for cameras explains where each format still makes sense.
Type A and Type B share the same PCIe/NVMe architecture, but they are physically incompatible: a Type B card will not fit a Type A slot, and no adapter changes that. The camera body locks you into one format, and the card's sustained write performance — not its maximum read figure — determines whether it keeps pace with your recording mode.
This guide explains how CFexpress cards are rated, which camera ranges use each format, why capacity changes sustained write speed, and how to avoid the most common buying traps when picking a card for stills or video.
How CFexpress Cards Work
CFexpress is built on PCIe and NVMe, not the older CompactFlash or CFast interfaces. That is what allows the format to scale well beyond SD and XQD. Within CFexpress, Type A and Type B are two physical form factors with different lane counts and interface ceilings.
| Characteristic | CFexpress Type A | CFexpress Type B |
|---|---|---|
| Physical size | 20 × 28 × 2.8 mm | ~29.6 × 38.5 × 3.8 mm |
| PCIe lanes | 1 | 2 |
| CFexpress 2.0 theoretical interface | ~1 GB/s | ~2 GB/s |
| CFexpress 4.0 theoretical interface | ~2 GB/s | ~4 GB/s |
| Physical compatibility | Type A slots only | Type B slots; same physical format as XQD |
| Main camera ecosystem | Primarily select Sony bodies | Canon, Nikon, Fujifilm, Panasonic, Blackmagic, and others |
| Mainstream 2026 capacity observed | Up to 2TB | Up to 4TB |
| Interchangeable A ↔ B? | No | No |
Type B shares its physical dimensions and connector lineage with XQD, which is why some XQD cameras gained CFexpress support through firmware updates. That does not mean XQD and CFexpress Type B are universally interchangeable — a compatible camera may require specific firmware support before it accepts CFexpress.
CFexpress 2.0 vs 4.0: What Actually Changes
CFexpress 4.0 approximately doubles the theoretical interface ceiling at the same form factor: Type A moves from roughly 1 GB/s to 2 GB/s, and Type B from roughly 2 GB/s to 4 GB/s. Those numbers are real, but they have very little to do with in-camera capture speed on most current bodies.
Nikon's Z6III accepts CFexpress 4.0 cards but limits transfer to CFexpress 2.0 speed in-camera. ProGrade states that current cameras generally cannot exploit its Gen 4 cards' full throughput. In other words, a 3,600 MB/s Type B card will not make a camera that writes at 400 MB/s write any faster during burst shooting.
Where Gen 4 becomes defensible is offload. If you pair a CFexpress 4.0 card with a USB4 reader, a fast host port, and a fast SSD, the card's extra bandwidth can noticeably shorten ingest times. A sports shooter moving roughly 1,500 frames from a Gen 4 card through a USB4 reader reported cutting download time by about half versus an older CFexpress 2.0 workflow. That is a real benefit, but it belongs to the computer, not the camera.
VPG, Sustained Write, and the Mb/s Trap
Three different numbers get mixed up constantly on CFexpress product pages.
Peak write is the headline "up to" figure: 1,700 MB/s, 3,500 MB/s, and so on. It describes a best-case sequential burst, not continuous recording performance.
Sustained write is what the card can maintain over a long write. It is often much lower than peak, and it can vary significantly by capacity within the same product family.
VPG is a minimum sustained write guarantee, not a maximum speed. VPG200 means the card must maintain at least 200 MB/s; VPG400 means at least 400 MB/s. Neither number says anything about peak read or peak write.
There is also a units trap. Camera video specs are usually quoted in megabits per second (Mb/s), while card speeds are quoted in megabytes per second (MB/s). There are 8 bits in 1 byte. A 1,200 Mb/s video bitrate is roughly 150 MB/s of data before overhead, so it can run comfortably on a VPG200 card even though the camera spec sounds far higher than 200.
The practical rule: for demanding video, look at the exact recording mode's media requirement, then match it to VPG and sustained write. A card that briefly benchmarks at 3 GB/s can still drop frames if long-write performance falls below the camera's data stream.
Which Cameras Use Which Card?
The camera decides the format. Here are verified examples of current bodies and their CFexpress requirements.
| Camera / recorder | Card format | Relevant verified requirement |
|---|---|---|
| Sony α1 II | Type A + SD | Type B unsupported. 8K XAVC HS up to 520 Mb/s can require VPG200 Type A; 1,200 Mb/s S&Q modes require VPG200 Type A. |
| Sony α7 V | Type A + SD | Slot 1 is hybrid Type A/SD; Slot 2 SD. High-bitrate S&Q up to 1,200 Mb/s requires VPG200 Type A. |
| Canon EOS R5 Mark II | Type B + SD | Type B slot supports CFexpress 2.0/VPG400 media; demanding RAW modes reach roughly 400 MB/s card-speed requirements. |
| Nikon Z6III | Type B/XQD + SD | CFexpress 4.0 media works, but Nikon limits transfer to the CFexpress 2.0 standard in-camera. |
| Nikon Z8 | Type B/XQD + SD | Nikon recommends high-performance Type B cards, specifically VPG400-class for N-RAW/ProRes RAW. |
| Fujifilm X-H2S | Type B + SD | Type B handles the highest-throughput modes; 6.2K ProRes HQ can reach extremely high data rates. |
| Panasonic Lumix GH7 | Type B + SD | Type B is the high-speed media option; burst capacity is materially higher than with SD. |
| Panasonic Lumix S1RII | Type B + SD | Supports high-resolution video including internal 5.8K ProRes RAW/HQ to Type B. |
| Blackmagic PYXIS 6K | Type B | Dual CFexpress Type B slots plus USB-C external media recording. |
One recorder misconception: common Atomos Ninja monitor-recorders use their own SSD or media workflows rather than accepting CFexpress A/B cards directly. Do not assume a cinema recorder implies CFexpress compatibility.
Capacity and Sustained Write: A Hidden Variable
Two cards can share a product name, the same peak specs, and the same VPG badge, yet sustain very different writes at different capacities. This is not a minor quirk; it can change whether a card keeps up with your camera.
Angelbird's AV PRO SE CFexpress B v4 family is the clearest example:
| Capacity | Sustained write |
|---|---|
| 256GB | ~500 MB/s |
| 512GB | ~1,050 MB/s |
| 1TB | ~2,100 MB/s |
The same family spans a 4x difference in sustained write. A photographer who buys the 256GB card for a demanding video mode may run into problems that the 1TB model would handle easily.
ProGrade's Type A Iridium line shows the same pattern in a smaller format:
| Capacity | Sustained write |
|---|---|
| 480GB | ~800 MB/s |
| 960GB | ~1,450 MB/s |
This is why peak "up to" figures are dangerous to extrapolate. When in doubt, check the manufacturer's per-capacity sustained write specification for the exact SKU you are buying.
Capacity limits have also shifted. Lexar now lists 2TB Type A cards, so the old claim that Type A tops out at 1TB is outdated. Type B reaches 4TB in current mainstream lines from Lexar, SanDisk, and Angelbird.
Firmware, Heat, and Long-Term Reliability
A CFexpress card is not a set-and-forget purchase. Firmware matters more than most buying guides acknowledge.
Angelbird released firmware AVX4.00 in November 2025 for its AV PRO SE CFexpress B v4 line. The company said it resolved a rare edge case affecting device stability and data integrity, and recommended updating. Sony separately maintains a repair program for certain older CEA-G Type A cards that could become unrecognized or fail to save images at low temperatures, extended through June 2029.
Heat is common on CFexpress media, but forum anecdotes do not prove brand-wide defects. SanDisk, Angelbird, ProGrade, and other manufacturers all attract occasional reports of hot cards or isolated failures, while the same threads also contain years of trouble-free use. Treat normal operating heat as expected, firmware updates as routine maintenance, and isolated anecdotal failures as just that — anecdotes.
One final trap is marketplace metadata. A current Lexar 1TB Type A listing still references 900/800 MB/s in its short title, while the same page's product data identifies the PCIe 4.0 model at 1,800/1,650 MB/s. Manufacturer documentation must override Amazon headlines. If a card's speed claim sounds too low or too high for the generation being sold, verify it against the official specification before buying.
Recommended CFexpress Type A Cards
Sony CEA-G480T 480GB CFexpress Type A
- Format: CFexpress Type A, PCIe Gen 4 x1
- Capacity family: 240GB, 480GB, 960GB, 1,920GB
- Max read/write: 1,800 MB/s read / 1,700 MB/s write
- VPG: VPG400
- Dimensions: 20 × 28 × 2.8 mm
- Construction: TOUGH-series bend, drop, dust, and moisture resistance
Verdict: A strong current-generation Type A card for Sony bodies that need VPG400-class sustained video, with Sony's ruggedized construction. It sits at the premium end of the Type A market.
Lexar Professional GOLD CFexpress 4.0 Type A 1TB
- Format: CFexpress 4.0 Type A
- Capacity family: 256GB, 512GB, 640GB, 1TB, 2TB
- Max read/write: 1,800 MB/s read / 1,650 MB/s write
- Sustained write: 1,400 MB/s
- VPG: VPG400
- Dimensions: 20 × 28 × 2.8 mm
- Weight: 2.5 g
Verdict: One of the strongest Type A options for high-capacity Sony workflows, and the family that makes 2TB Type A a real current tier. Its 1,400 MB/s sustained write is a major step above the VPG400 floor.
Delkin BLACK CFexpress Type A 4.0 VPG200 960GB
- Format: CFexpress Type A 4.0
- Capacity family: 480GB, 960GB
- Max read/write: ~1,830 MB/s read / ~1,740 MB/s write
- Minimum sustained write: 500 MB/s
- VPG: VPG200
- Warranty: Lifetime, with 48-hour replacement service
- Tested compatibility: Sony α1, α7 IV, α7R V, α7S III, α9 III, FX3, FX6, FX30
Verdict: The Delkin BLACK line is the reliability-and-warranty play. Its 500 MB/s minimum sustained write is generous for VPG200, and the replacement program is a real differentiator for working photographers.
Recommended CFexpress Type B Cards
Sony CEB-G960T 960GB CFexpress Type B
- Format: CFexpress Type B, PCIe Gen 3 x2
- Capacity family: 240GB, 480GB, 960GB, 1,920GB
- Max read/write: 1,850 MB/s read / 1,750 MB/s write
- VPG: VPG400
- Dimensions: ~29.6 × 38.5 × 3.8 mm
- Operating temperature: −25°C to 70°C
Verdict: A Gen 3 Type B card whose in-camera write ceiling remains far beyond what most bodies require. It is a strong choice when absolute Gen 4 offload speed is not the priority.
Lexar Professional GOLD CFexpress 4.0 Type B 1TB
- Format: CFexpress 4.0 Type B
- Capacity family: Up to 4TB
- Max read/write: 3,600 MB/s read / 3,300 MB/s write
- Sustained write: 3,000 MB/s
- VPG: VPG400
- Dimensions: ~29.6 × 38.5 × 3.8 mm
- Weight: 7.8 g
Verdict: Excellent on paper and a top choice for USB4 offload, but remember that most in-camera capture will not approach 3,000 MB/s. It is a future-proofing and ingest play rather than a proportional shooting-speed upgrade.
ProGrade Digital CFexpress Type B 4.0 Iridium 800GB
- Format: CFexpress Type B, PCIe Gen 4 x2, NVMe 1.4c
- Capacity family: 400GB, 800GB, 1.6TB
- Max read/write: 3,550 MB/s read / 3,000 MB/s write
- Sustained write: 1,500 MB/s for 800GB and 1.6TB; 850 MB/s for 400GB
- VPG: VPG400
- Warranty: Three-year, Refresh Pro support
Verdict: ProGrade explicitly states that current cameras generally cannot exploit Gen 4's full speed. The main benefit is fast ingest via USB4. The 800GB/1.6TB capacities sustain better than the 400GB model, so capacity choice matters within this exact family.
Angelbird AV PRO SE CFexpress B v4 1TB
- Format: CFexpress Type B v4
- Capacity family: 256GB, 512GB, 1TB, 2TB, 4TB
- Max read/write: 3,700 MB/s read / 2,300 MB/s write
- Sustained read/write: 3,500 MB/s read / 2,100 MB/s write
- Dimensions: ~29.8 × 38.5 × 3.8 mm
- Weight: ~7 g
-
Note: Firmware AVX4.00 (Nov 2025) addressed a rare stability/data-integrity edge case
Verdict: Stable Stream technology targets consistent sustained recording, and the 1TB model sustains 2,100 MB/s. However, the 256GB and 512GB siblings sustain far less — do not buy the small capacity expecting the same performance.
Delkin BLACK CFexpress Type B 4.0 VPG400 1TB
- Format: CFexpress Type B 4.0
- Capacity family: 512GB to 2TB
- Family max read/write: up to 3,700 MB/s read / up to 3,220 MB/s write
- VPG: VPG400
- Warranty: Lifetime, with 48-hour replacement program
Verdict: A "buy once" option for Nikon Z8, Canon, and Fujifilm shooters who prioritize minimum sustained speed and warranty over marginal peak benchmarks. Its tested ecosystem spans Canon, Fujifilm, Nikon, Panasonic, and cinema systems.
SanDisk Extreme PRO CFexpress 4.0 Type B 1TB
- Format: CFexpress Type B, PCIe Gen 4
- Capacity family: 128GB, 256GB, 400GB, 1TB, 2TB, 4TB
- Max read/write: 3,700 MB/s read / 3,500 MB/s write
- Dimensions: ~29.7 × 38.6 × 3.75 mm
- Weight: 9.5 g
- Features: SmartIdle power management, drop resistance up to 5 m
Verdict: Fast, with a broad capacity range, but VPG certification varies by capacity. Check the exact SKU's VPG rating if you need guaranteed sustained video performance. Heat reports exist, as they do for all high-performance CFexpress cards, but they do not establish a defect rate.
Which CFexpress Card Should You Buy?
Start with the camera slot, not the card. If you shoot a Sony α1 II or α7 V, you need Type A. If you shoot a Canon EOS R5 Mark II, Nikon Z6III/Z8, Fujifilm X-H2S, Panasonic GH7/S1RII, or Blackmagic PYXIS, you need Type B. There is no crossover.
Then identify your most demanding recording mode. For Sony Type A shooters, check whether that mode requires VPG200 or VPG400. For Canon, Fujifilm, or Nikon video users, check the exact bitrate and codec: a 1,200 Mb/s stream is roughly 150 MB/s of data, so a VPG400 card is more than enough for most modes, but N-RAW, ProRes RAW, and high-bitrate 6.2K ProRes HQ may push you toward the highest sustained-write tiers.
Finally, choose capacity based on sustained write and workflow, not just file count. If you shoot long bursts or high-bitrate video, do not assume the smallest capacity in a family performs like the largest. The Angelbird 256GB and ProGrade Type A 480GB sit well below their 1TB/960GB siblings in sustained write.
Frequently Asked Questions
Q: Can I use a CFexpress Type B card in a Type A slot?
No. Type A and Type B have different physical card bodies and are not interchangeable. The camera decides which format fits.
Q: Is Type B always faster than Type A?
At the same generation, Type B has roughly twice the theoretical interface bandwidth because it uses two PCIe lanes instead of one. But in-camera speed is limited by the camera's own interface and firmware, so a faster Type B card does not automatically improve shooting on a body that caps transfer rates.
Q: Does CFexpress 4.0 double my camera's burst or video performance?
Frequently not. Nikon's Z6III limits CFexpress 4.0 cards to CFexpress 2.0 speed in-camera, and ProGrade states that current cameras generally cannot exploit Gen 4's maximum throughput. The practical advantage of CFexpress 4.0 today is faster computer offload through a USB4 reader.
Q: What does VPG400 mean?
VPG400 means the card is guaranteed to maintain a minimum sustained write speed of 400 MB/s. It is not a maximum speed, and it does not describe peak read or write figures.
Q: Why does the same card family sustain differently at different capacities?
Manufacturers often pair larger capacities with more flash dies or a wider internal architecture, which raises sustained write speed. Angelbird's AV PRO SE v4, for example, sustains about 500 MB/s at 256GB, 1,050 MB/s at 512GB, and 2,100 MB/s at 1TB.
Q: Do I need to update CFexpress card firmware?
Yes, when the manufacturer releases an update. Firmware fixes can address stability or data-integrity edge cases, as Angelbird's November 2025 AVX4.00 update did for its AV PRO SE B v4 line. Treat firmware checks as routine maintenance, especially for professional work.
Conclusion
CFexpress Type A and Type B are two sides of the same PCIe/NVMe standard, but they are not choices you make independently of your camera. The body locks you into a format; the recording mode and VPG rating then determine how much sustained write you actually need. Peak "up to" figures, interface generations, and capacity ceilings matter far less than matching the card to the camera's most demanding setting.
For Sony shooters, Type A's compact size and hybrid SD/Type A slot design make 2TB cards and VPG400 media a realistic current choice. For Canon, Nikon, Fujifilm, and Panasonic shooters, Type B's wider ecosystem and higher theoretical ceiling are the default, with Gen 4 mainly paying off for USB4 offload rather than in-camera speed.
Once you have narrowed the format, compare sustained write by specific capacity, check firmware, and ignore marketplace headlines that may lag the actual product generation. If you are still deciding between SD and CFexpress, revisit our SD and CFexpress-compatible memory card guide to map the right format to your workflow. For video shooters evaluating external recorders and monitoring alongside high-bitrate capture, our camera monitors guide covers the recorder side of the workflow.
