Best Sony A390 Memory Cards

By Nathaniel Stephan
Last Updated: October 10, 2019
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Best Sony A390 Memory Card

The Sony A390 has dual card slots, each using a different card type. One memory card slot uses SD and SDHC memory cards. The second card slot uses Sony PRO Duo and PRO-HG Duo cards.

SDHC memory cards are compatible, so the largest SD card that you can use is 32GB. The PRO Duo and PRO-HG Duo slot supports 32GB and smaller cards.

Only one of the card slots can be used at a time. There is a switch inside the card cover that enables you to decide on which card slot to record to.

PRO Duo memory cards are a proprietary format that is held by Sony. As a result, SD cards are lower priced and frequently provide greater performance than PRO Duo memory cards.

In a hurry? My recommendation is this SD memory card in the A390:

SanDisk Extreme Pro UHS-I SDHC Memory Card

SanDisk Extreme Pro 32GB SDHC Memory Card

64GB or larger cards are not compatible with the camera.

Need a new lens? Have a look at the 6 Best Sony A390 Lenses.

Best SD Cards

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

You do not need to buy a card made by SanDisk for your Sony A390. Just make sure the name is cool. That will ensure you get fast read/write rates, dust resistance, and more professional features.

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

When I have experienced problems with memory cards has been when I have used inexpensive brands. Not having a brand name increases the chance of card errors or data corruption.

If you are looking to spend less, don't buy a cheap card. You will avoid problems by purchasing a name brand memory card with a reduced capacity.

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.
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 A390 SD Card Compatibility

SD and SDHC cards are usable in the Sony A390. If you want the best performance, use an SD card.

The newest SDXC and SDUC cards can't be used with the A390.

Currently, there are four different specifications of SD (Secure Digital) memory cards. Newer memory specs add more tech that provides for more storage space and much faster read/write 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 card is dependant on the sequential read and write speeds. Card file write speed is important for continuous shooting as well as video.

Slows memory cards can cause a reduction in the number of continuous photos the Sony A390 can take. This is due to the camera's buffer not being able to write data to the memory card fast enough.

When shooting video, a slow card can cause the recording to end. The video file might also end up being corrupted. If you are going to record video, it is essential the memory 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.

A memory card is labeled with a Class rating based on the sustained continuous transfer rate of the card. Class 10 is the maximum rating, even though cards are available that have a faster read/write speed.

Here you can see a list of Classes and the corresponding lowest transfer rates:

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

Practically every SD card worth picking for the Sony A390 will be a Class 10 SD memory card. In the time since the camera was introduced, SD memory cards have gotten so 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 comes in SDHC, SDXC, and SDUC cards. UHS memory cards to achieve increased read and write speeds.

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

You can determine the rating of a memory card by reading the label. If the memory card has UHS, a Roman numeral I, II, or III can be found on the front of the 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 A390 PRO Duo Card Compatibility

Both PRO Duo And PRO-HG Duo memory cards can be used in one card slot. PRO-HG means that the card may have read speeds up to 50MB/s as well as a 15MB/s minimum write speed.

Only PRO Duo cards that are 32GB or have a lower capacity will be compatible in the A390.

PRO Duo cards are usually about two times as expensive as an SD memory card. Thanks to the price difference, I would not recommend purchasing a PRO Duo card for your A390.

Do Both Memory Cards Slots Need to Be Used in the A390?

No, the Sony A390 is unable to use both card slots concurrently.

Other camera brands make cameras that can use both card slots simultaneously. That unlocks more features such as overflow protection, mirroring the memory cards, and splitting up RAW files and JPEGs.

Not having the features to use both card slots for expanded settings, means you don't need to spend more money on a PRO Duo memory card.

Image Capacity

Nikon SD Memory Card Contacts

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

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

Related Cameras

That's what you should be looking for in an SD or PRO Duo memory card. The SanDisk Extreme Pro 32GB is the best Sony A390 memory card.

Here are similar cameras with identical requirements:

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