Sony A7Sii Memory Card Compatibility

By Nathaniel Stephan
Last Updated: October 16, 2019
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Sony SD Memory Card Compatibility

Two different kinds of memory cards can be used with the Sony A7Sii. SD, SDHC, and SDXC memory cards can be used and in addition Sony XC-HG Duo, PRO-HG Duo, and PRO Duo memory.

The A7Sii only has one card slot. You will have to choose between an SD or PRO Duo card.

Sony owns the PRO Duo card format. SD memory cards have had a wider adoption that PRO Duo cards because SD memory cards are quite a bit faster as well as cheaper.

Need a memory card now? My unbiased recommendation is this SD memory card combined with the A7Sii:

SanDisk Extreme Pro UHS-I SDHC Memory Card

SanDisk Extreme Pro 32GB SDHC Memory Card

A great price to performance ratio. Read and write speeds are good enough for use in a future camera.

Best SD Cards

SanDisk, Lexar, and PNY are brands that produce high-quality Memory cards. The best memory cards I have owned have been SanDisk Extreme Pro cards.

You do not need to purchase a card made by SanDisk for your Sony ILCE-7SM2. Make sure the name is cool. That will make sure you get fast transfer rates, water resistance, and other professional features.

I have not run into issues with Lexar Professional or PNY Elite Performance cards.

When I have experienced problems with SD cards has been when cheap generic brands were used. A low-cost card increases the possibility of data corruption or card errors.

If you want to save money, don't buy a cheap card. You will avoid problems by purchasing a professional-quality memory card with a reduced storage capacity.

Recommended SD Cards

SanDisk Extreme Pro UHS-I SDHC Memory Card

SanDisk Extreme Pro 32GB SDHC Memory Card

  • Best value for the money.
  • Capacities from 16 GB to 128 GB.
  • Transfer speeds up to 80 MB/s.
  • Class 10.
  • UHS-I
Lexar 633x 23GB UHS-I SDHC Memory Card

Lexar Professional 633X 32GB SDHC UHS-I Card

  • High speed card.
  • Capacities from 16 GB to 1 TB.
  • Transfer speeds up to 95 MB/s.
  • Class 10.
  • UHS-I/UHS-III.
PNY Flash Memory Card Elite Performance 32GB SDHC UHS-I

PNY Elite Performance 32GB SDHC Card

  • High quality card.
  • Transfer speeds up to 95 MB/s.
  • Class 10.
  • UHS-I.

Sony A7Sii SD Card Compatibility

SDXC, SDHC, and SD cards can be used in the Sony A7Sii. Use an SD card to get the maximum overall performance from the camera.

The most recent SDUC memory cards will not be useable in the A7Sii.

Currently, there are four types of Secure Digital (SD) cards. Newer memory specs add features that allows for greater memory capacity and improved data transfer rates.

  • Secure Digital (SD) - 128MB to 2GB.
  • Secure Digital High Capacity (SDHC) - 4GB to 32GB.
  • Secure Digital eXtended Capacity (SDXC) - 64GB to 2TB.
  • Secure Digital Ultra Capacity (SDUC) - 4TB to 128TB.

SD Card Speed

The speed rating of an SD memory card is dependant on the sequential read and write speeds. The speed of a card is essential for video and continuous shooting.

A slow memory card can cut down the number of continuous photos the Sony A7Sii can capture. This is because the buffer in the camera is not able to write to the card fast enough.

When recording video, a slow SD card can cause recording to end. The video file could also be corrupted. If you intend to record video, it is critical the SD card you use meets the minimum requirements of the camera.

Read speed is important for transferring files to a computer. If you have cards that are full, a memory card with a fast read speed will save you time.

Speed Class Rating

Example of where to find SD Card Speed Class
10 inside of a C showing that the SD card is Class 10.

The Sony A7Sii requires no less than a Class 4 SD card.

A memory card is labeled with a Class rating based on the continuous write speed of the card. Class 10 is the maximum rating, even though SD cards exist that have a higher read/write speed.

Here is a list of the Classes and the applicable minimum read/write speeds:

  • Class 2 - 2MB/s
  • Class 4 - 4MB/s
  • Class 6 - 6MB/s
  • Class 8 - 8MB/s
  • Class 10 - 10MB/s or faster

Practically every card worth picking for the Sony A7Sii will be a Class 10 card. In the time since the introduction of the camera, Memory cards have gotten much faster.

Ultra High Speed (UHS)

Example of an SD memory card with a UHS-I rating.
This card has a UHS-I rating. UHS-II and UHS-III cards will have II or III, respectively.

The Ultra High Speed (UHS) bus is found in SDHC, SDXC, and SDUC cards. UHS allows offers a way to increase file transfer rates.

Three different specs exist. They are UHS-I, UHS-II, and UHS-III.

Look at the front of the SD card to find the UHS rating of a memory card. If the memory card has UHS, a Roman numeral I, II, or III can be seen on the front of the memory card.

  • UHS-I - Maximum transfer rate of 104 MB/s
  • UHS-II - Maximum transfer rate of 312 MB/s
  • UHS-III - Maximum transfer rate of 624 MB/s

Sony A7Sii PRO Duo Card Compatibility

One PRO Duo or PRO-HG Duo memory cards can be used in the Sony A7Sii. What PRO-HG signifies is that the memory card has a minimum read speed of 50mb/s and a 15mb/s minimum write speed.

PRO Duo memory cards are often double the cost of an SD memory card. Considering the price difference, I will not recommend purchasing a PRO Duo card for use in a A7Sii.

Image Capacity

Sony SD Memory Card Contacts

Below is an approximate estimation of how many large JPEG images you can expect to store on each size of SD card.

  • 4GB - 1,160 images
  • 8GB - 2,320 images
  • 16GB - 4,640 images
  • 32GB - 9,280 images

Related Cameras

At this time you are aware of just about everything about PRO Duo and SD memory cards. The SanDisk Extreme Pro 32GB is the best Sony ILCE-7SM2 memory card.

Here are a few more cameras that use similar memory cards as the Sony A7Sii:

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