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Sony CFexpress Type A memory card, compact rectangular shape, matte finish

Sony

Sony CFexpress Type A 320GB 800/700MB/s

SKU CH-HM2K-EF534

CFexpress Type A card with 320 GB capacity, 800 MB/s read and 700 MB/s write speeds, plus VPG 400 for sustained high-bitrate video recording

  • TypeMemory Card
  • VPG 400 guarantee ensures stable high-bitrate video recording
  • 800MB/s read speed accelerates file offload for faster workflow
  • 700MB/s write speed enables uncompressed continuous RAW shooting
  • CFexpress Type A form factor fits latest compact professional cameras
  • 320GB capacity stores extensive 4K 120p footage sessions

CFexpress Type A 320GB

The Sony CFexpress Type A card provides 320GB of ultra-high-speed storage for professional photographers and videographers using compatible cameras such as the FX6, FX3, a1, a7S III and a7 IV. It delivers read speeds up to 800MB/s and write speeds up to 700MB/s for demanding workflows.

CFexpress Type A interface limits

The CFexpress Type A standard was developed to give compact cameras the ultra-high-speed performance required for cutting-edge video creation. It maximises the capabilities of supported cameras and their latest image-processing engines, offering roughly twice the speed of the best SDXC cards.

320GB capacity and VPG 400 headroom

The 320GB capacity handles uncompressed continuous RAW shooting for fast-moving action and professional high-bitrate video recording such as 4K 120p. The VPG 400 guarantee ensures sustained write performance for critical recording, while the compact body maintains durability for field use.

Highlights

  • VPG 400 guarantee ensures stable high-bitrate video recording
  • 800MB/s read speed accelerates file offload for faster workflow
  • 700MB/s write speed enables uncompressed continuous RAW shooting
  • CFexpress Type A form factor fits latest compact professional cameras
  • 320GB capacity stores extensive 4K 120p footage sessions

Specifications

TypeMemory Card

Questions about this item

Should I pick the 320GB CFexpress Type A card or a larger capacity for 4K 120p video?

The 320GB model sustains 700 MB/s write with VPG 400, meeting the bit-rate demands of 4K 120p; choose a larger card only if you need more total recording time per card.

What does the 800 MB/s read speed mean when I offload footage to my workstation?

You can transfer up to 800 MB/s from the card to a compatible reader, so a full 320GB card empties in roughly seven minutes under ideal conditions.

Does the CFexpress Type A interface limit the 700 MB/s write speed in my Sony FX3 or a7S III?

No — the Type A lane supports the card’s full 700 MB/s write and 800 MB/s read, so the camera can record 4K 120p without hitting an interface bottleneck.

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