SPECIFICATIONS
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
Brand Name: MicroDrive
Certification: NONE
Choice: yes
Class Level: C10
High-concerned chemical: None
Origin: Mainland China
Package: Yes
Type: TF / Micro SD Card
UHS Level: U3
Video Speed Class: V10
semi_Choice: yes

4GB=approximately 3.5GB-3.7GB
8GB=approximately 7GB-7.3GB
16GB=approximately 14GB-15GB
32GB=approximately 28GB-30GB
64GB=approximately 58GB-60GB
128GB=approximately 119GB-120GB
256GB=approximately 230GB-238GB
Vendors are using Flash memory decimal arithmetic: 1 MB = 1000KB, 1G = 1000 MB
Calculated, operating system with binary arithmetic: 1 MB = 1024KB, 1 GB = 1024 MB;
This is calculation difference between manufacturer and our PC,just for you reference.