SanDisk Memory Card High Endurance Video Monitoring TF Card 256GB 128GB 64GB 32GB Micro SD Card Up to 100MB/s Flash Card
About Capacity:
16GB=approximately 14GB-15GB
32GB=approximately 28GB-30GB
64GB=approximately 58GB-59GB
128GB=approximately 110GB-120GB
Please Google 'Memory card capacity' to get more information.