What do the A1 and A2 Ratings on SD and microSD Cards Mean?
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SanDisk Extreme 100MB/s UHS-I U3 V30 A1 32GB microSDHC Memory Card Review with speed tests and benchmarks - Camera Memory Speed Comparison & Performance tests for SD and CF cards
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SanDisk 32GB Extreme V30 Action Camera Micro SD Card (SDHC) A1 UHS-I U3 - 100MB/s - 2 Pack US$27.86 | MyMemory
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PRO V30 U3 Card│TEAMGROUP
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