Sony CFexpress Type A Memory Card 640GB - High-Speed Storage

In this review the Sony CFexpress Type A 640GB card is evaluated as a high-capacity, high-performance option for content creators who need reliable, sustained throughput for high-resolution, high bitrate video. The bottom line: it suits users seeking dependable write performance and effective heat management during long recording sessions; the card delivers up to 800MB/s read and 700MB/s write speeds and a large 640GB capacity that reduces card swaps on long shoots.

Key Features

• Fast read speed: Up to 800MB/s read enables quick offloads and smooth playback of high-resolution footage when transferring large files to a workstation.
• High write throughput: Up to 700MB/s write supports sustained, high bitrate recording without buffering interruptions for compatible cameras and recorders.
• Large capacity: The 640GB size offers extended recording time for long shoots and high resolution files, reducing the need to change cards frequently.
• Thermal design: Effective heat dissipation helps maintain performance during extended high bitrate transfers and long recording sessions.
• Rugged construction: TOUGH durability and resistance to impact, bending, dust and moisture provide confidence on location shoots and in adverse conditions.
• Environmental protection: Built to resist humidity, X-ray, electrostatic charge and ultraviolet radiation for safer transport and storage.

Who It's For

The Sony CFexpress Type A 640GB card is aimed at professional and serious enthusiast photographers and videographers who record high resolution and high bitrate video or shoot burst RAW stills and need fast sustained write speeds and a large single-card capacity. It is also a good fit for users who value rugged hardware and predictable thermal behavior during long takes.

Those on a strict budget or working with older cameras that do not support CFexpress Type A should look elsewhere for lower-cost or compatible SD/CF solutions, since this card is intended for devices that can fully use its high write speed.

Pros & Cons

Pros

• Very high sequential read and write speeds suitable for high bitrate recording and fast transfers.
• Large 640GB capacity minimizes card changes on long shoots or multi-hour sessions.
• Durable TOUGH design and multiple environmental protections increase reliability in field use.

Cons

• Requires a camera or reader that supports CFexpress Type A to use full performance.
• Higher capacity and performance can carry a premium price compared with lower speed cards.

Specifications

Our Verdict

The Sony CFexpress Type A 640GB is a strong choice for professionals and demanding hobbyists who need sustained high write speeds and a large single-card capacity for uninterrupted high-resolution video or burst shooting. Its thermal design and rugged build make it a reliable investment for fieldwork, offering good value when paired with compatible equipment.

Frequently Asked Questions

Will this card work in my camera?
It will work only in cameras or readers that explicitly support CFexpress Type A; check device compatibility before purchasing.

Is the 640GB capacity suitable for long shoots?
Yes, 640GB provides extended recording time for high resolution, high bitrate video and reduces the frequency of card swaps.

How does it handle heat during long recordings?
The card includes effective heat dissipation features to help sustain high bitrate transfers and reduce thermal throttling during extended use.