1. USB connection,support Hot plug & Play.
2. No external power supply .
3. Support different types of os.
4. Solid State Storage, Shock proof and electromagnetic proof.
5. Write protection switch
6. Durable data storage
7. Fast speed in write/read transfer
8. Hardware Requirement: PC with USB connection,Notebook,MAC
9. Life:>1 million times
4GB = approximately 3.6GB-3.8GB
8GB = approximately 7.4GB-7.6GB
16GB= approximately 14GB-15GB
32GB= approximately 28GB-30GB
64GB= approximately 58GB-60GB
This is calculation difference between manufacturer and your PC, please Google ‘Memory card capacity’ to get more information.