Best Memory Cards for Sony a7 III

The Sony a7 III mirrorless camera is renowned for its exceptional image quality, impressive autofocus capabilities, and versatile features. It offers two memory card slots to ensure ample storage capacity for your photography needs. Card slot 1 supports ultra-fast UHS-II SD memory cards, while Card Slot 2 is compatible with UHS-I memory cards. Choosing the right memory card is crucial to optimize the camera’s performance, especially when shooting 4K videos and capturing high-resolution images. In this article, we will explore some of the best memory cards available for the Sony a7 III.

The Sony a7 III is a powerhouse of a camera that caters to the needs of professional photographers and enthusiasts alike. With its impressive image resolution and video capabilities, having a reliable and fast memory card is essential for maximizing the camera’s potential.

Why You Need a Fast Memory Card

In the world of photography, every second counts. When shooting with the Sony a7 III, a fast memory card ensures that you can capture your shots without any delay. This is particularly crucial when shooting in burst mode or recording high-quality 4K videos. A slow memory card can significantly hinder your shooting experience by causing buffer delays and longer write times.

Understanding Memory Card Speeds

Before diving into the best memory cards for the Sony a7 III, it’s important to understand the various speed classifications. Memory cards are typically labeled with a speed class or a UHS speed class. The speed class refers to the minimum sustained write speed, while the UHS speed class represents the maximum bus interface speed.

For the Sony a7 III, it is recommended to use UHS-II SD memory cards for Card slot 1, as they offer blazing-fast read and write speeds. On the other hand, UHS-I SD memory cards are suitable for Card Slot 2.

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Best UHS-II SD Memory Cards for Sony a7 III

1. Sony SF-G Tough UHS-II Card (300 MB/s, V90) – Fastest UHS-II SD Card

  • UHS-II / V90 / U3 / Class 10
  • Max Read Speed: 300 MB/s
  • Max Write Speed: 299 MB/s

as of September 20, 2023 4:52 pm
The fastest UHS-II SD card is recommended. Sony SF-G Tough Series UHS-II Memory Cards are the world’s fastest SD memory cards, with read speeds up to 300 MB/s and write speeds up to 299 MB/s. They are well-suited for 4K and Full HD video recording and extremely rapid continuous shooting. The V90 speed class guarantees minimum write rates of 90 MB/s. If you want the fastest write speed with a V90 rating and 250-300MB/s read rates, this is the card for you.

2. Lexar Professional 2000x UHS-II Card (300 MB/s, V90) – Best Value

  • UHS-II / V90 / U3 / Class 10
  • Max Read Speed: 300 MB/s
  • Max Write Speed: 260 MB/s

as of September 20, 2023 4:52 pm
Best Value! The Lexar Professional 2000x UHS-II card can read up to 300 MB/s and write up to 260 MB/s, making it ideal for any UHS-II camera that shoots 4K or Full HD video at 8fps+. Faster buffer cleaning implies more shots. Free Lexar SD UHS-II Reader speeds file transmission from card to PC, accelerating workflow. The V90 speed class guarantees minimum write rates of 90 MB/s.

3. SanDisk Extreme PRO UHS-II Card (300 MB/s)

  • UHS-II / U3 / Class 10
  • Max. Read Speed: 300 MB/s
  • Max. Write Speed: 260 MB/s

as of September 20, 2023 4:52 pm
SanDisk Extreme PRO UHS-II SDXC Memory Cards can read 300 MB/s and write 260 MB/s. Amazingly quick! Perfect for continuous filming and 4K video. U3 speed class guarantees minimum write rates of 30 MB/s.

Best UHS-I SD Memory Cards for Sony a7 III

4. SanDisk Extreme PRO UHS-I Card 170 MB/s (V30, U3)

  • UHS-I / V30 / U3 / Class 10
  • Max Read Speed: 170 MB/s
  • Max Write Speed: 90 MB/s

Save: 21.11
as of September 20, 2023 4:52 pm
A+! The SanDisk Extreme Pro 170 MB/s UHS-I card is the fastest UHS-I SD card for Sony a7 III and one of my top recommendations for consumer UHS-I cameras. The SanDisk Extreme Pro 170MB/s UHS-I card is suitable for quick burst shooting, 4K video, and full HD video at 120fps. SanDisk Extreme Pro UHS-I cards have a V30 and U3 speed class rating, guaranteeing 30 MB/s write rates. SanDisk Extreme Pro 170 MB/s UHS-I cards are available in 64GB, 128GB, 256GB, and 512GB capacities.
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5. SanDisk Extreme UHS-I SDXC Card (V30, U3)

  • UHS-I / V30 / U3 / Class 10
  • Max Read Speed: 150 MB/s
  • Max Write Speed: 70 MB/s

as of September 20, 2023 4:52 pm
This card is for those on a tight budget who wish to save money. The SanDisk Extreme UHS-I SDXC Card (V30, U3) provides read rates of up to 150MB/s and write speeds of up to 70MB/s, making it perfect for fast-action or continuous burst mode photography, as well as full HD, 3D, and 4K video. A write-protect switch prevents unintentional data loss.

6. Kingston Canvas React UHS-I SDXC Card (V30, U3)

  • UHS-I / V30 / U3 / Class 10 / A1
  • Max Read Speed: 100 MB/s
  • Max Write Speed: 80 MB/s

as of September 20, 2023 4:52 pm
Kingston Canvas React UHS-I SDXC Memory Card supports read rates of up to 100 MB/s and write speeds of up to 80 MB/s. This Canvas React card’s V30 speed class ensures 30 MB/s write rates. Burst-mode images and 4K video are supported.

Factors to Consider When Choosing a Memory Card

When selecting a memory card for your Sony a7 III, there are a few factors to keep in mind:

  • Speed: Look for memory cards with fast read and write speeds to ensure smooth and uninterrupted shooting.
  • Capacity: Consider your shooting requirements and opt for a memory card with sufficient storage capacity to accommodate your needs.
  • Reliability: Choose reputable brands known for producing reliable and durable memory cards.
  • Price: Balance your budget with performance requirements, and choose a memory card that offers the best value for money.

Tips for Maintaining Memory Card Performance

To ensure the longevity and performance of your memory cards, follow these simple tips:

  • Format in-camera: Format your memory cards using the camera’s formatting function rather than on your computer.
  • Backup regularly: Create backups of your data to prevent loss in case of card failure.
  • Avoid extreme temperatures: Store your memory cards in a cool and dry place to prevent damage from temperature fluctuations.
  • Handle with care: Avoid bending or dropping your memory cards, as physical damage can lead to data corruption.
  • Replace when necessary: Regularly check for signs of wear or damage, and replace your memory cards as needed.
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Selecting the right memory card for your Sony a7 III is crucial for optimizing its performance and ensuring a smooth shooting experience. Whether you opt for a fast UHS-II SD memory card or a reliable UHS-I option, prioritize speed, capacity, and reliability when making your choice. With the right memory card, you can unleash the full potential of your Sony a7 III and capture stunning photos and videos.


1. Can I use a UHS-I memory card in both slots of the Sony a7 III?

Yes, you can use UHS-I memory cards in both Card Slot 1 and Card Slot 2 of the Sony a7 III. However, to take advantage of the camera’s high-speed capabilities, it is recommended to use UHS-II cards in Card Slot 1.

2. What is the advantage of using UHS-II memory cards?

UHS-II memory cards offer significantly faster read and write speeds compared to UHS-I cards. This translates to quicker buffer clearing times, allowing you to capture continuous bursts of images or record high-quality videos without delays.

3. Are UHS-II memory cards backward compatible with UHS-I devices?

Yes, UHS-II memory cards are backward compatible with UHS-I devices. However, the cards will operate at UHS-I speeds when used with UHS-I compatible devices.

4. How much storage capacity do I need for my Sony a7 III?

The required storage capacity depends on your shooting habits and the type of content you capture. If you frequently shoot in high resolution or record lengthy videos, opting for higher capacity memory cards, such as 128GB or 256GB, is advisable.

5. How do I maintain the lifespan of my memory cards?

To maintain the lifespan of your memory cards, it is important to format them regularly in-camera, handle them with care, avoid extreme temperatures, create backups of your data, and replace them when signs of wear or damage appear.

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