SanDisk Extreme Pro 256GB MicroSD XC Class 10 A1 UHS-I Mobile Memory Card up to 170MB/s read speed (SDSQXCZ-256G) with Dual Slot MemoryMarket MicroSD & SD Memory Card reader and Memory Card
A1 vs A2 SanDisk MicroSD Card: What's The Difference? - MyMemory Blog