Sony A7ii Memory Card Compatibility

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

Two different types of memory cards are compatible with the Sony A7ii. SD, SDHC, and SDXC memory cards are compatible and in addition Sony XC-HG Duo, PRO-HG Duo, and PRO Duo cards.

There’s is only room for only one memory card to be in the camera at the same time. You'll need to make a decision between a PRO Duo or SD memory card.

Sony created and is the owner of the PRO Duo format. Consequently, SD cards are more cost-effective and can have greater performance than PRO Duo cards.

In a hurry? My SD card recommendation for the Sony A7ii is:

SanDisk Extreme Pro 128GB UHS-I SD Card

SanDisk Extreme Pro 128GB SD Card

  • Best value for the money.
  • Capacities from 32 GB to 2TB.
  • Transfer speeds up to 170 MB/s.
  • Class 10 & UHS-I
  • Temperature Proof, Water Proof, Shock Proof, and X-ray Proof.

Best SD Cards

SanDisk, Lexar, and PNY are brands that produce the best Memory cards. The best SD cards I have owned have been the SanDisk Extreme Pro cards.

That does not mean you need to purchase a card from SanDisk for your Sony ILCE-7M2. Just make sure the name sounds cool. That will ensure you get fast transfer speeds, shock resistance, and more professional features.

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

When I have experienced problems with memory 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 be better off buying a professional-quality memory card with a reduced storage capacity.

Recommended SD Cards

SanDisk Extreme Pro 128GB UHS-I SD Card

SanDisk Extreme Pro 128GB SD Card

  • Best value for the money.
  • Capacities from 32 GB to 2TB.
  • Transfer speeds up to 170 MB/s.
  • Class 10 & UHS-I.
  • Temperature Proof, Water Proof, Shock Proof, and X-ray Proof.
Lexar Professional 1066X 128GB SD UHS-I Memory Card

Lexar Professional 1066x 128GB SD Card

  • Lexar Professional Silver Card.
  • Transfer speeds up to 160 MB/s.
  • Class 10 & UHS-I.
  • Includes Lexar Recovery Tool Software.
  • Designed for durability in harsh conditions.

Check price at: Amazon, Adorama, eBay

PNY Elite Performance SDXC 128GB Memory Card

PNY Elite Performance 128GB SD Card

  • Lower priced card.
  • Transfer speeds up to 95 MB/s.
  • Class 10 & UHS-I.
  • Magnet, Shock, Temperature, and Waterproof.

Check price at: Amazon, Adorama, eBay

Sony A7ii SD Card Compatibility

SD, SDHC, and SDXC cards can be used with the Sony A7ii. Use a memory card to get the maximum performance out of the A7ii.

The latest SDUC cards won't work with the A7ii.

Currently, there are four different types of SD (Secure Digital) cards. New memory specs add tech that provides for more storage space as well as faster data transfer speeds.

  • 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 determined by the sequential read and write speeds. SD card file write speed is important for video in addition to continuous shooting.

Slows cards can cut down the number of continuous images the Sony A7ii can capture. This is because the camera's buffer is not able to write data to the memory card quickly enough.

With video, a slow memory card can cause an abrupt end to recording. The video file may also end up being corrupted. If you are going to record video, it is crucial the card you use meets the required minimum continuous write speed for video.

Card read speed is important for transferring files to a computer or laptop. If you have cards that are full, a card with a fast read speed will reduce the amount of time it takes the transfer to complete.

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 A7ii requires no less than a Class 4 SD card.

A memory card is given a Class rating based on the sustained continuous transfer rate of the card. Class 10 is the top rating, even though SD cards exist that are far faster.

Here are all of the Class ratings and the applicable minimum transfer rates:

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

Virtually any memory card worth buying for the Sony A7ii will be a Class 10 SD card. In the time period since the release of the camera, Memory cards have gotten a good deal 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 built into SDUC, SDXC, and SDHC cards. The UHS bus cards to achieve increased write speeds.

Three separate versions exist. They are UHS-I, UHS-II, and UHS-III.

You can find out the UHS rating of an SD memory card by examining the front of the SD memory card. A Roman numeral I, II, or III on the front of the card, that is going to be the rating of your SD 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 A7ii PRO Duo Card Compatibility

One PRO-HG Duo or PRO Duo cards can be used in the Sony A7ii. What PRO-HG signifies is that the memory card has a minimum read speed of 50mb/s and a 15mb/s minimum write speed.

You will need to pay more to get a PRO Duo memory card than a comparable SD card. Considering the price difference, I will not recommend purchasing a Sony PRO Duo card for use in a A7ii.

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.

  • 32GB - 9,280 images
  • 64GB - 18,560 images
  • 128GB - 37,120 images
  • 256GB - 74,240 images
  • 512GB - 148,4800 images

Related Cameras

There is nothing else you need to be aware of about SD and PRO Duo memory cards. The SanDisk Extreme Pro 128GB is the best Sony ILCE-7M2 memory card.

Here are a few more cameras that use similar memory cards as the Sony A7ii:

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