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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: Silicon Power 1TB SDXC Micro SD Card Gaming Memory Card with Adapter Write Speed 80MB/s : Electronics
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Amazon.com: ProGrade Digital microSD Memory Card - V60 microSD Card for DSLR and Action Cameras - High Speed Transfer of Files & Large Storage - Up to 250MB/s Read and 130MB/s Write
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