Sell Sandisk Extreme Micro SD Card A1 4K Memory Card 32GB 64GB 128GB TF Card best price

About capacity: 16GB=approximately 14GB-15GB 32GB=approximately 28GB-30GB 64GB=approximately 58GB-59GB 128GB=approximately 118GB-120GB This is calculation difference between manufacturer and our PC, please Google \'Memory card capacity\' to get more information. Understanding speed classes: *The SD card association defines card speeds using two terms: Speed Class and UHS Speed Class. *Speed class is the original rating used and the number defines the card speed; 4 for 4MB/s, 6 for 6MB/s. 10 for 10MB/s etc. *Speed based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 byte