I bought a 64GB Sandisk Extreme Pro for my phone a few years ago and love the amazing speeds showing no difference between this and the internal storage. I decided I needed to upgrade to a 128GB card, but after reading some reviews of fake microSD cards I downloaded a speed tester and tested my old 64GB card and then this one right out of the box. The 128GB speed was even half that of my older one. I've tested my other Sandisk microSD cards and they were all real speeds, so I guess it's good luck. I sent it back and will buy it from Best Buy if I can.
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