SD Type:microSDXC
Application:High Speed Read and Write,Mobile Phone,Tablet,Notebook,Tachograph,Camera,Monitoring,Speakers,Digital Devices,Robot,UAV,File Storage,Others
Application Performance Class:A1
Video Speed Class:V10
UHS Level:U1
Class Level:C10
Package:Yes
Read/Write Speed:100X
Type:TF / Micro SD Card
Origin:Mainland China
Certification:CE
About capacity:
32GB = approximately 28GB-30GB
64GB = approximately 58GB-60GB
128GB = approximately 115GB-120GB
256GB = approximately 224GB-240GB
This is calculation difference between manufacturer and your PC, please Google 'Memory card capacity' to get more information.
Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1GB = 1.00 Billion bytes.