Which Memory Card Does Your Camera Actually Need?

For casual photography, capacity is the main question. For professional video, it's the opposite — sustained write speed is what determines whether your footage actually gets written to the card without interruption.

Two rating systems matter here:

• V-rating (Video Speed Class): guarantees a minimum sustained write speed. V90 guarantees at least 90MB/s sustained — the highest tier in the SD standard.
• VPG (Video Performance Guarantee): used for CFexpress cards, guarantees sustained write speed under real recording conditions, not just burst speed. VPG800 guarantees a minimum of 800MB/s sustained.

This distinction is why two cards with similar "max speed" marketing numbers can perform very differently once you're actually recording high-bitrate footage for an extended take.

Best for: Mirrorless hybrid shooters, documentary and run-and-gun video, high-fps 4K, professional photographers doing extended RAW burst sequences.

V90 remains the top tier of the SD standard and is still the primary card slot on a huge range of cameras — Sony Alpha and FX series, Panasonic Lumix, Nikon Z-series, Fujifilm X and GFX bodies, and many professional camcorders.

Why creators choose V90 over lower-rated SD cards:

• Sustained 90MB/s+ write speed handles 4K 60p/120p and high-bitrate codecs (like All-Intra or ProRes on supported bodies) without dropped frames
• Reliable for long-form documentary and event work, where a card has to sustain recording for extended periods, not just short bursts
• Broad compatibility means one card format across multiple camera bodies and readers

Where V90 hits its ceiling: 8K video, extremely high-bitrate RAW video, and the highest frame-rate slow-motion modes on modern mirrorless flagships increasingly exceed what SD — even at V90 — can sustain. That's where CFexpress comes in.

Best for: Sony full-frame mirrorless shooters (A7S III, A1, A9 series, FX3/FX6), anyone who needs CFexpress-class speed without switching to a physically larger card format.

CFexpress Type A is the smaller of the two CFexpress form factors, built specifically because Sony wanted CFexpress-level performance in a card the same physical size as SD. A VPG800-rated Type A card guarantees sustained write speeds of at least 800MB/s — several times faster than even the fastest SD cards.

Why it matters in real shooting scenarios:

• Handles 4K 120p, 8K recording, and high-bitrate RAW/ProRes RAW without the buffer bottlenecks that push SD cards to their limit
• VPG800 specifically ensures performance doesn't degrade mid-recording, which is critical for long interviews, live events, or any take you can't reshoot
• Dual-slot cameras that mix an SD slot with a Type A slot let you use SD for backup/proxy and Type A for your primary high-bitrate master

One practical advantage worth calling out: CHIPFANCIER's VPG800-rated Type A cards are now available at up to 2TB capacity. Pairing the guaranteed sustained speed with that much headroom means fewer card swaps mid-shoot and less time spent managing storage during long interviews, live events, or full-day production days — a meaningful workflow improvement for anyone shooting high-bitrate footage for extended periods.

Trade-off: Type A cards are more expensive per GB than SD, and while adoption is growing, they're currently used by a narrower set of camera bodies — mostly Sony's professional mirrorless line.

Best for: Cinema cameras (RED, Canon Cinema EOS, Blackmagic), high-end mirrorless flagships (Canon R5/R5 C, Nikon Z9, Panasonic S1H), sports photographers shooting massive RAW burst sequences.

CFexpress Type B is physically larger than Type A and built on a faster PCIe/NVMe interface, capable of sequential speeds well beyond 1,000-1,700MB/s depending on the card. This is the format of choice when you're recording internal RAW video, 8K cinema footage, or shooting hundreds of uncompressed RAW frames per burst on a high-megapixel body.

Why professionals rely on Type B:

• Sustains the extreme write throughput needed for internal RAW/ProRes RAW recording on cinema and high-end mirrorless bodies
• Handles massive continuous burst sequences on 45+ megapixel sensors without the buffer filling up
• Faster offload to editing workstations post-shoot, which matters on tight production schedules

For productions that generate very large amounts of RAW or high-bitrate footage in a single session, CHIPFANCIER's Type B cards are also available in capacities up to 4TB.

Trade-off: Higher cost, larger physical size (won't fit SD/Type A slots), and it's genuinely more capacity than most photographers or casual videographers need. This format is for workflows where the camera body specifically requires or benefits from it.

1. Check your camera's manual first. Every camera specifies a minimum required speed class for its highest video/photo modes — that's your non-negotiable floor.
2. Match the format to your card slot. Type A and Type B are not interchangeable, and neither fits an SD slot.
3. Buy for your most demanding use case, not your average one. If you occasionally shoot 8K or high-fps slow motion, your card needs to handle that mode even if it's not your everyday setting.
4. Don't chase marketing "max speed" numbers. Look for the guaranteed sustained rating (V90, VPG800) — that's the number that determines whether your footage actually records cleanly start to finish.
5. Not sure if a specific card is compatible with your camera model? Use our Compatibility Checker to confirm before you buy
   
   

Whether you're building a proxy/master workflow with SD and CFexpress Type A side by side, or running a full CFexpress Type B pipeline for cinema production, the right card isn't about buying the fastest thing available — it's about matching the guaranteed sustained speed to what your camera and workflow actually demand.