HIKVISION Memory Card 8GB 16GB 32GB 64GB 128GB 256GB Up to 92MB/s Micro SD Card MicroSDHC/XC TF Card for Phon

About Capacity:

16GB=approximately 14GB-15GB

32GB=approximately 28GB-30GB

64GB=approximately 57GB-59GB

128GB=approximately 115GB-120GB

Please Google 'Memory card capacity' to get more information.