This is our list of the best memory cards for the Sony A7 III.
The A7 III has 2 x SD memory card slots. The first slot supports UHS-II, while the second one supports UHS-I. What this means is, if you want the maximum speed possible, you’ll want to buy a UHS-II card for that first slot.
Also, don’t buy just any random cheap card. You risk losing all of your shots, and waiting too long for the buffer to clear. Imagine shooting a wedding, concert, or just traveling, and not being able to take pictures because of your memory card…
In this guide, we’ve selected the 3 best cards. Either one will be great for the A7 III!
Speed Class of SD Cards
|Class 4||4MB/s||Too slow for most modern cameras. Skip it.|
|Class 6||6MB/s||A little bit better but unless you take 3 pictures a year, skip it.|
|Class 10||10MB/s||Good enough for most cameras with 20+ megapixels and Full HD video.|
|U1 (UHS)||10MB/s||Good enough for most cameras with 20+ megapixels and Full HD video|
|U3 (UHS)||30MB/s||Perfect for fast burst cameras, Full HD at 60fps and 4K video. This is what you want for A7 III|
As mentioned above, the Sony A7 III has 2 memory card slots. The first one is UHS-II compatible and can take advantage of the extra speeds offered. Compared to UHS-I, you will get faster minimum writing and reading speeds in-camera, and also faster file transferring directly to your computer.
If you send hundreds or thousands of photos/videos to your computer on a weekly basis, UHS-II is definitely your best friend.
We don’t recommend picking a Class 4 or 6 card, as these might even result in in-camera errors since they’re not good enough. Skip these completely.
Go with a 32GB or 64GB sized card, and buy a couple of these if you need lots of storage. It’s better than buying one huge card because you risk losing all of your shots if that 1 card fails.
These are the best 3 SDHC/SDXC memory cards you can get:
- Lexar Professional 300MB/s UHS-II U3
- SanDisk Extreme Pro 300MB/s UHS-II U3
- SanDisk Extreme Pro 95MB/s UHS-I U3
Lexar Professional 300MB/s UHS-II U3
The Lexar Professional 300MB/s UHS-II U3 is a UHS-II card, so you can expect the fastest writing and reading speeds with the Sony A7 III. It’s the perfect match for any UHS-II compatible camera that records 4K or has a fast continuous shooting speed. The buffer clearing time will be much much quicker which means you can take more shots. You will also send videos and photographs much quicker to your computer.
Don’t have a memory card reader that supports such speeds? Luckily you get a free Lexar UHS-II reader that’ll greatly reduce the waiting time. You also get a free downloadable Imaging Rescue software. It comes in 32GB, 64GB and 128GB sizes.
SanDisk Extreme Pro 300MB/s UHS-II U3
The SanDisk Extreme Pro 300MB/s UHS-II U3 is another UHS-II card that is worth every dollar. SanDisk has been in the memory card game for a longer time, and has more reputation.
However, both cards will get you the same writing and reading speeds. 4K videos, burst shooting at full resolution, it’s an easy task for these two cards. Close your eyes and pick randomly; or, choose the cheaper one (sometimes SanDisk goes for ~$10 less than Lexar).
SanDisk Extreme Pro 95MB/s UHS-I U3
The SanDisk 64GB Extreme Pro 32GB U3 is our favorite card for UHS-I slot. The A7 III has one, and you won’t see any benefit from using a UHS-II card there. If you want to save some money, then this is the best card. You could also use it in the UHS-II slot and still take pictures normally, but the buffer time won’t be as quick.
The speed makes it perfect for whatever you’re doing; fast bursts with large megapixel cameras, 4K video, let alone Full HD at 60fps. It comes in 16GB, 32GB, 64GB, 128GB and 256GB sizes.
Comparison of the 3 Memory Cards
|Lexar Professional 300MB/s U3||64GB||Writing files: ~240MB/s. Reading files: ~270MB/s|
|Sandisk Extreme Pro 300MB/s U3||64GB||Writing files: ~230MBs. Reading files: ~260MB/s|
|Sandisk Extreme Pro 95MB/s U3||32GB||Writing files: ~90MBs. Reading files: ~95MB/s|
What Brands are the Best?
Your photographs and videos are stored on a memory card, so you should definitely not try to save any money here by buying from unknown, cheap brands. While you save a few bucks, you probably won’t even get the advertised speeds, and are at a bigger risk of losing your shots.
We see too many beginners choosing the cheap route here, but until you transfer your shots to a computer/online, this is where they’re stored at. You want the memory card to be the most reliable piece of your equipment!