ProGrade Digital SDXC UHS-II V90 Memory Card (256GB)

Card works as advertised. Use for 400mbs video recording.

Was worried about throughput with 256GB size, but zero issues so far!

battery life is superb

I purchased the 128GB version of this card for my Canon EOS M6 Mark II which clearly stated it supports UHS-II cards. And it does. Well, kind of. Sometimes. If the camera is turned off for a while, let's say, a couple of hours, when first turned on, I get this error:Card cannot bve accessedReinsert/change the card orformat card with cameraBut if I turn the camera off and on again, the card will work fine. This is what I have tried:1. I low level formatted the card in the camera2. I low level formatted the card in a Windows 10 computer3. I updated the firmware of the camera to the latest (v 1.0.1)Regardless what I do, the symptom is the same. If I use a UHS-1 card, I have no problem at all.So, I am not sure if the problem is with the camera or the card. Will you help me to figure this out?

Very pleased. All too often the manufacturers inflate their speeds in their advertising. ProGrade understated theirs. I am a Pro full time photographer who shoots a good bit of sports so was looking for faster write speeds for my Canon Eos R. Did a speed test with Crystal Disk Benchmark 5 and you can see the results in the screenshot.Did a real world test comparing with my earlier UHS card, The Sandisk Extreme Pro 95MB/s card, which is the best UHS I card. The Prograde card let me shoot 80 images non-stop in high speed single focus mode and the Sandisk card was 52 in a row. This was simply shooting to the point where the camera stopped shooting because it was writing to disk. Bottomline, I think this is the best bang for the buck UHS II SD card out there and clearly performance wise in the same ballpark as the Sandisk and Sony competitors.Kudos to Prograde!!! FYI, I was not compensated in ANY way for this review! It shows me as reviewing the 256gb card when I actually purchased the 128gb. My bad I guess but I don't know how to change it now.

I have approx 8 of these cards for my Sony a7iii cameras, I shoot regularly on these cards and so far they have been great. I have found no issues and these cards and are working out great. When shooting in RAW uncompressed format (49MB per shot) during burst mode (10 shots) takes about 6 seconds to finish writing.Taken over 60000+ photos in past 7 months and not one single glitch on these cards so far.

ProGrade products are all top-notch right now, you really can't go wrong. Will purchase again.

I have had no issues with the quality of the product so far.I do find the write speed very disappointing for a UHS-II card when other brands such as Sandisk and Sony has better write speed

パッケージは簡素でしたが、なんで今まで複雑にしてたんだろう？と思うほど小さくて開封しやすくて合理的なものでした。 容量、スピードのわりに価格も抑えられており、6100万画素機のSONY α7R IVには最適な選択です。