CFexpress vs SD Cards: Which Memory Card Do You Need?

By Harrison Cameras | Published: 2026-10-21

Category: Comparisons

Compare CFexpress Type B and SD cards for speed, capacity, and cost. Find out which memory card suits your camera and shooting style.

Quick Answer

For 8K RAW video and high-speed bursts, choose a CFexpress Type B card like the Lexar CFexpress Pro Gold. For everyday 4K and stills, a high-speed SD card like the SanDisk Extreme Pro is more affordable and widely compatible.

Speed and Performance

CFexpress Type B cards use the PCIe interface, delivering read speeds up to 3600MB/s and write speeds up to 3300MB/s. This makes them ideal for demanding tasks like 8K RAW video capture and rapid-fire continuous shooting.

SD cards, even the fastest UHS-I models, top out at around 200MB/s transfer speeds. That is still plenty for 4K UHD video and everyday photography, but it will bottleneck high-bitrate RAW workflows.

Capacity and Cost

CFexpress cards typically offer larger capacities, but they come at a premium. A 512GB Lexar CFexpress Pro card costs significantly more than a 64GB SD card, so you are paying for speed and capacity.

SD cards are budget-friendly and available in smaller sizes, making them a practical choice for casual shooters or as a secondary card.

Compatibility and Use Cases

Not all cameras support CFexpress. Many modern mirrorless cameras have dual slots, but some only accept SD. Check your camera's specifications before investing in a new card format.

For action cameras, drones, and smartphones, microSD cards like the Lexar 633x offer a compact and cost-effective solution for Full HD and even 4K video.

The Trade-Offs at a Glance

CFexpress Type B: Choose CFexpress when your camera supports it and you need maximum speed for 8K RAW or high-frame-rate video. You pay more per gigabyte, but you get the performance to match. Verify your camera's CFexpress compatibility before buying.
SD UHS-I Card: Opt for a high-speed SD card like the SanDisk Extreme Pro when you shoot 4K video or stills and want broad compatibility across devices. It is a cost-effective choice for most photographers. If your camera has dual slots, an SD card can serve as a backup or overflow.
microSD Card: Use a microSD card for action cameras, drones, or smartphones where space is tight. It offers decent speed for Full HD and 4K, but not the extreme throughput of CFexpress. Ensure your device supports the card's speed class for smooth recording.

Product Facts

Lexar CF Express Pro Memory Card | 512GB | Type B | Gold Series R3600/W3300: The Lexar CFexpress Pro Gold delivers read speeds up to 3600MB/s and write speeds up to 3300MB/s, with 8-point protection and data recovery software. This card is built for professionals who shoot 8K RAW video or need the fastest possible transfer speeds to avoid dropped frames.
Lexar CF Express Pro Memory Card | 512GB | Type B | Gold Series R3600/W3300
SanDisk Extreme Pro 64GB - SDXC Memory Card: The SanDisk Extreme Pro 64GB SDXC card offers UHS Speed Class 3 (U3) for 4K UHD video and transfer speeds up to 200MB/s. It provides reliable, high-speed performance for 4K video and rapid stills at a price that suits enthusiasts and working photographers alike.
SanDisk Extreme Pro 64GB - SDXC Memory Card
Lexar 633x MicroSDHC UHS-I Card Blue Series - 32GB: The Lexar 633x microSDHC UHS-I card supports 1080p Full-HD and 4K UHD video with transfer speeds up to 100MB/s. It is a compact and affordable option for smartphones, action cameras, and drones where space is limited and speed demands are moderate.

Which Card Fits You?

Best for

Professionals shooting 8K RAW video or high-speed bursts who need maximum speed and can justify the cost of CFexpress.
Enthusiasts and hybrid shooters who want reliable 4K performance at a reasonable price with an SD card.
Content creators using action cameras, drones, or smartphones who value compact size and affordability with a microSD card.

Not for

Budget-conscious shooters who do not need 8K RAW or extreme burst rates—SD cards offer better value.
Cameras that lack a CFexpress slot—always check compatibility first.