1. 100% brand new Real capacity sd card
2. Higher speed and greater storage
3. SD Card + SD adapter + retail package
4. Perfect for Cell Phones, Cameras, MP3/MP4 Player and More
5. 100% Satisfaction Guaranteed!
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.
CLASS 6: 4GB (Reading Speed:10-16 MB/S; Writing Speed: 6-8 MB/S)
CLASS 10: 8GB 16GB 32GB 64GB (Reading Speed:14-20 MB/S; Writing Speed: 10-17 MB/S)
NOTE: sometimes it will be faster, depending on different equipments.