Products compatible with A1 standard of microSD card perform twice as much as the minimum standard and may exceed products compatible with A2 standard - GIGAZINE
Verilux® SD Card 64 GB Memory Card High Speed Camera SD Card for HD Video Recording and High-Resolution Pictures Universal SD Card Devices 80MB/s Reading 30MB/s Writing Support SDHC/SDXC Standards: Buy Online
Understanding specifications printed on the Micro SD card : r/coolguides
Picking the Right SD Card: What Do the Numbers Mean? - 42West
Micro USB OTG USB 2.0 Card Reader Adapter SD/Micro SD Memory Card Reader with Standard USB Male Micro USB Male Connector for Smartphones Tablets with OTG Function for SDXC SDHC SD MMC
SD card - Wikipedia
Kingston 128GB MicroSD SDHC SDXC Class10 UHS-I Memory Card 100MB/s Read 10MB/s Write with standard SD adaptor ~SDCS/128GB