
The best way to make sure a MicroSD card (or any other type) is legitimate is to fill it up and use it when its capacity reaches 50% exceeds. . This card works fine, as does my 256GB silicon power card. "Too Cheap To Be Real" cards are low capacity cards that lie about being huge, so filling them up will reveal the lie. Both of my Silicon Power cards are genuine.

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Memory card Samsung microSDXC 256 GB Class 10, V30, A2, UHS-I U3, R 130 MB/s, adapter to SD
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