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The answer that the Geek squad gave you about the 3 in the "U Shape" meaning that it is Class 3 is incorrect. The speed ratings for SD memory cards are defined by the SD Association. As time has passed, they have come up with various speed ratings. The Speed Class ratings are Class 2, 4, 6, and 10. This card is a Class 10 which is the fastest class rating. The UHS Speed Class ratings are U1 and U3. This card is a U3, which again is the fastest rating.
Sorry, there was a problem. Please try again later.Geek squad verified the "U Shape" located at bottom right corner on the card holder with a number indicates the class. In this case a 3 and I need a 10.
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