What do A1 & A2 Ratings on SD and microSD Cards Mean?
Amazon.com: SanDisk Ultra 64GB MicroSD XC Class 10 A1 UHS-1 Mobile Memory Card up to 98MB/s Read Speed (SDSQUAR-064G-GN6MN) with Mini MemoryMarket MicroSD Memory Card Reader : Electronics
Canvas Select Plus microSD Card, A1, Class 10 UHS-I, 16GB to 512GB - Kingston Technology
Micro Center Premium 64GB microSDXC Card UHS-I Flash Memory Card C10 U3 V30 A1 Micro SD Card with Adapter - Micro Center
64GB MicroSD Micro SD Card 100MB/s Class 10 A1 TF Memory Card 2x64G =128GB Lot 2 | eBay