Lexar 633X Memory Card 512GB 256GB 128GB 64GB SDXC Micro sd card 32GB SDHC 95M-100M/s

Lexar High Performange 633x High Speed MicroSD UHS-I Micro SDHC 32GB Class 10 64GB microSDXC Micro SDXC U1 TF Memory Card 1080p full-HD 3D 4K video for Quadcopter Drone Aerial Camera Tablet Pad Gopro Hero Sport Camcorder Smartphone Mobile Phone Mp3 Driving Recorder Camera Mobile Device

***Premium memory solution for sports camcorders, tablets, and smartphone

***Quickly captures, stores, plays back, and transfers media files, including 1080p full-HD, 3D, and 4K video

About capacity:
32GB = approximately 28GB-30GB
64GB = approximately 58GB-60GB
128GB = approximately 115GB-120GB
256GB = approximately 230GB-238GB
512GB = approximately 460GB-476GB
This is calculation difference between manufacturer and your PC, please Google ‘usb flash drive capacity’ to get more information.
Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1GB = 1.00 Billion bytes.