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It is both One is for the data bus or pin contacts the other is the data speed rating. SD Bus Mode UHS-I is the contact arrangement on the back UHS Speed Class U3 Only a few 4 K devices need the next version UHS-II in U3 speed
Sorry, there was a problem. Please try again later.SD Bus Mode UHS-I UHS Speed Class U3 SD Speed Class Class 10 The SD speed class is a measure of writing data like for photographs, the UHS is for continuously recording video, so it is a matter of different jobs. They are a measure of how this card performs in different jobs.
Sorry, there was a problem. Please try again later.Class 10 UHS 3, 4K. faster speed, newer & more expensive. I have trouble burning and viewing video from a UHS 1 4K SD card on my computer 2 years ago then I found 2 software can do it. I believe the latest computer should work on 4K SD now. Samsung S8 can use UHS 3 for faster speed. Either one is OK. I have ScanDisk & Samsung EVO VHS 1 & 3. I use either one on my new or old devices (phones, tablets, cameras & camcorders).
Sorry, there was a problem. Please try again later.When I received the 64GB SDXC Memory it was marked 3. For the price I paid, that seems accurate. I think the description was wrong.
Sorry, there was a problem. Please try again later.the newest ones (in store) are U3, and fast at that. Also be aware, the 64 and up (128/ 256) are spec'd faster than the 32.
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