Sony SF-G64/T1 High Performance 64GB SDXC UHS-II Class 10 U3 Memory Card with blazing fast read speed up to 300MB/s

Sony is my go-to brand for SD cards. I do a lot of (semi-professional) photography, and I’ve never had a card fail, unlike SanDisk and Lexar. Small sample set, so not an indictment of the others.

I tested the performance both in-camera and on my PC (make sure you have a UHS-II capable reader). Easy to measure the performance on my PC, and I was very pleased to see both read and write speeds very close to the listed speeds. No way to directly measure I/O performance in the camera, but buffer flush operations were very quick.

Install the SD card monitoring software. Flash memory cells do wear out, and getting an early warning that your card is wearing out is pretty important.

I bought this to go with a new Sony A7RIII. I’m running this card as my primary with a SanDisk in slot 2. The first card I got corrupted an entire photoshoot and I was left with only my JPG backups on card 2. It happens unfortunately so I sent it back and got another one. Now I decided to shoot raw on both cards just in case. Every few photos I still get a completely scrambled, corrupted picture on the Sony card and zero issues on the second card. Absolute garbage cards for this price. Sending card #2 back now and going to another brand. Really disappointed.

I bought this card for my A7R III.

Fast cards have two advantages:
Rapid burst shooting: if you shoot tons of photos in a row, the buffer of your camera will fill, and then the speed of the card will matter. If you take photos in short bursts, or just one at a time, there isn’t much of a performance point in getting a fast card.

Image offloading: if you have a fast card reader (UHS-II), you can offload photos from your camera to your computer much faster if your card is also much faster. This benefits all people, regardless of the camera they own. It’s especially useful if you shoot a lot on the run and need to quickly offload photos to a laptop.

This card is fast, the buffer clears faster than my previous card rated at 150MB/s, but not *that* much faster. I tested it in two different card readers and I couldn’t get the speeds Sony advertises on the cards. I got around 200MB/s write and 235MB/s read. Really fast, but not the 299/300 printed on the card. For that, they lose some stars.

Exceptional speed and works perfectly in my D850. Obviously it works best in a UHS-II card slot, but it could be useful to keep in mind that even if you have a UHS-I card slot, you would still benefit from the extra speed when transferring the files from the card over to your computer (assuming that you have a UHS-II card reader).

When it comes to memory, use a trusted brand and don’t screw around with the risk of having a cheap card potentially get corrupted or die on you. Also keep in mind that even the best memory cards have a lifespan so if reliability is important to you, it’s generally a good idea to periodically buy new cards anyway while you rotate older cards out and away from mission-critical use.

Lightning fast on the Fuji X-T2. It definitely writes faster than the Lexar 2000x SD Cards, which have been my mainstay for a few years. I’ll update this review accordingly if any issues pop up.

This card has malfunctioned on me after only a month of use for no apparent reason in the middle of a critical shoot, causing me to lose a ton of important pictures.

It can’t be accessed by the camera, PC, or any other device for that matter. It simply doesn’t show up, like nothing is inserted. I cannot check it for errors or even format it.

It simply died, just like that. I returned the card to Amazon, and I’ll be looking for an alternative.

Not much to say, it’s an SD card. It’s UHS-II and isn’t slowing down my α7 III. The second slot would be the culprit if that were the case. It is hard to tell in normal usage, though. I haven’t run any benchmarks and my photo storage drives are mechanical. They max out at about 100 MB/s writes. I’m getting 80-100 when copying to my computer so there’s nothing out of the ordinary there.

Unless it fails on me prematurely, it is what it is. It handles long bursts of 10fps of uncompressed 24MP RAW . Solid product and comes in at a lower price than my usual Sandisk Extreme Pro cards. I feel fine recommending them and will purchase more for backup, capacity upgrades, and replacements.

Fast speed, it fixes my A7R3 perfectly. I do recommend it if you are using A9,A7R3,A7M3. It will save you huge time when you shoot continiously. And this is fastest SD card in the world.