Speed:

8GB/16GB/32GB-Class 10-SDHC

64GB/128GB-Class 10-SDXC

About capacity:

16GB=approximately 14GB-15GB

32GB=approximately 28GB-30GB

64GB=approximately 58GB-60GB

This is calculation difference between manufacturer and our PC, please Google 'Memory card capacity' to get more information

Features:

8/16/32/64/128GB: All Class 10 speed

Original high quality chip and flash modules

Fine work assistant, never get bored