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Markings: speed, size and class | Understanding microSD and SD cards: speeds, markings and more | Adafruit Learning System
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Amazon.com: Lexar E-Series 128GB Micro SD Card 2 Pack, microSDXC UHS-I Flash Memory Card with Adapter, 100MB/s, C10, U3, A1, V30, Full HD, 4K UHD, High Speed TF Card : Electronics
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