UHS, or Ultra-High Speed is a specification for Secure Digital cards that provides higher bandwidth than the "Class x" designations.

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What is the difference between the UHS version and the UHS speed class of a SD card?

What is the difference between a SD card UHS version (UHS-I or UHS-II) and the UHS speed class? It seems they go hand in hand. Are they just redundant (UHS-I is always UHS speed class 1 and UHS-II is ...
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Are Class 10 and UHS-1 SD cards really the same?

I'm seeing lots of cards advertised as being Class 10 and UHS-1 as if it's the same thing. Also, the "official" SDCard.org page says both Class 10 and UHS-1 have a minimum speed of 10 MB/s: ...
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Are UHS SD Cards backwards compatible with existing readers and other hardware?

I was shopping for a couple of new memory cards for new cameras this year and noticed that there are some SD cards that are now UHS-1 compatible. I wasn't sure what that really meant so I went looking ...