The new released Lexar Professional CFexpress Type A Gold Series Memory Card works well for my a7 iv.

I've taken some time to review the options for CFexpress Type-A cards that would complement our camera's capabilities, focusing on maximizing both performance and reliability. Here's a quick rundown of the top contenders based on their maximum read and write speeds:

1. Lexar Professional CFexpress Type A Gold: Tops the chart with impressive speeds of up to 900 MB/s read and 800 MB/s write. This card is ideally suited for those who prioritize high-speed photography and 4K video recording.

2. Delkin Devices CFexpress Type A: Offers robust performance with read speeds up to 880 MB/s and write speeds up to 730 MB/s, making it a solid choice for professionals who demand fast data transfer for efficient post-processing.

3. Angelbird AV Pro CFexpress Type A: With read speeds up to 820 MB/s and write speeds up to 730 MB/s, this card provides a great balance between speed and durability, ideal for extended shooting sessions in challenging environments.

4. Sony Tough CFexpress Type A: Sony's own offering with read speeds up to 800 MB/s and write speeds up to 700 MB/s. Designed to seamlessly integrate with your Sony a9 III, offering reliability and toughness against harsh conditions.

5. Lexar Professional CFexpress Type A Silver and ProGrade Digital CFexpress Type A Cobalt: Both cards deliver similar performance with up to 800 MB/s read and 700 MB/s write speeds, providing a good mix of speed and value for general photography and video work.

When selecting the right CFexpress Type-A card for your Sony a9 III, consider not only the speed but also factors like the reliability of the brand, warranty, and how the card performs under continuous shooting conditions. The Lexar Gold series stands out for its top-tier speed, making it a favorite for those who engage in high-speed sports photography or 4K video recording. However, the other options listed also offer compelling performance metrics and may provide better value or durability based on your specific needs.

I hope this summary helps you in making an informed decision. Happy shooting!

I use Sony SF-G CFExpress Type A card, it works well, only weak point is really expensive.