The Sony A330 has two card slots, each using a different card type. One memory card slot supports SD and SDHC cards. The other memory card slot uses Sony PRO-HG Duo and PRO Duo memory cards.
SDHC cards are compatible, therefore the largest SD card that works is 32GB. The PRO Duo and PRO-HG Duo slot supports 16GB and smaller cards.
One card slot is accessible at a time. A switch inside the memory card cover is how you determine which memory card slot to write data to.
PRO Duo cards are a proprietary card format that is held by Sony. Because of this, SD memory cards are cheaper and frequently have better performance than PRO Duo memory cards.
In a hurry? My recommendation is this SD card in the A330:
64GB or larger cards are not compatible with the camera.
Want a new lens? Go look at the 6 Best Sony A330 Lenses.
Best SD Cards
SanDisk, Lexar, and PNY are brands that make high-quality Memory cards. The best memory cards I have used have been the SanDisk Extreme Pro memory cards.
You do not need to purchase a card from SanDisk for your Sony A330. Make sure the name is cool. That will mean you get fast transfer speeds, water resistance, and other professional features.
I have not had issues with PNY Elite Performance or Lexar Professional SD cards.
The problems I have encountered with cards has been when I have used inexpensive no-name brands. Being cheap increases the possibility of card failure or data corruption.
If you are looking to save money, don't buy a cheap card. You will be better off purchasing a name brand card with a smaller storage capacity.
Recommended SD Cards
- Best value for the money.
- Capacities from 16 GB to 128 GB.
- Transfer speeds up to 80 MB/s.
- Class 10.
- High speed card.
- Capacities from 16 GB to 1 TB.
- Transfer speeds up to 95 MB/s.
- Class 10.
- High quality card.
- Transfer speeds up to 95 MB/s.
- Class 10.
Sony A330 SD Card Compatibility
SD and SDHC memory cards can be used by the Sony A330. Use a card to get the optimal overall performance from the camera.
The newest SDUC and SDXC cards can't be used in the A330.
Currently, there are four different specifications of SD (Secure Digital) cards. Newer memory specs add features that provide for increased memory capacity, as well as improved read/write 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 essential for clearing the camera buffer for continuous shooting and recording video.
A slow memory card can cause a decrease in the number of continuous frames the Sony A330 can take. This is because the camera's buffer is not 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 could also be corrupted. If you intend to shoot video, it is essential the card you use meets the required continuous write speed for video.
Card read speed is nice to have for transferring files to a computer or laptop. If you have cards that are full, an SD card with a fast read speed will save you time.
Speed Class Rating
A memory card is labeled with a Class rating based on the continuous transfer rate of the card. Class 10 is the highest rating, even though SD memory cards are available that have a faster write speed.
Here you can see all of the Classes and corresponding 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
Nearly every SD card worth deciding to buy for the Sony A330 will be a Class 10 SD memory card. In the time period since the announcement of the camera, Cards have gotten much faster.
Ultra High Speed (UHS)
The Ultra High Speed (UHS) bus is built into SDUC, SDXC, and SDHC cards. UHS memory cards to have increased read and write speeds.
Three separate versions exist. They are UHS-I, UHS-II, and UHS-III.
To know what the UHS rating of a card, look on the front of the card. If the memory card has UHS, a Roman numeral I, II, or III can be seen on the front of the SD 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 A330 PRO Duo Card Compatibility
One of the card slots will accept PRO Duo and PRO-HG Duo cards. PRO-HG means that the memory card potentially has read transfer rates up to 50MB/s plus a 15MB/s minimum write speed.
PRO Duo cards that are 16GB or have a lower capacity will be compatible in the A330.
PRO Duo cards are around two times as expensive as an SD memory card. As a result of the size of the price difference, I will not recommend ordering a PRO Duo card for an A330.
Do Both Memory Cards Slots Need to Be Used in the A330?
No, the Sony A330 will not be able to use the two card slots at the same time.
Competing manufacturers make cameras that can use both memory card slots simultaneously. That gives added features such as mirroring the cards, overflow protection, in addition to splitting up RAW files and JPEGs.
Not having the chance to use both memory slots for more features, means that you shouldn't waste the additional money on a PRO Duo memory card.
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
Those are the specs you need to know when buying an SD or PRO Duo memory card. The SanDisk Extreme Pro 32GB is the best Sony A330 memory card.
Here are cameras with similar requirements: