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 Flash memory vendors are using decimal arithmetic:1MB = 1000KB,1G = 1000MB 

calculated, the operating system using binary arithmetic:1MB = 1024KB,1GB = 1024MB;

so there are some differences between display capacity and nominal capacity of flash memory product.

 

4GB     = approximately 3.6GB-3.8GB

8GB     = approximately 7.4GB-7.6GB

16GB   = approximately 14GB -15GB

32GB   = approximately 28GB -30GB

64GB   = approximately 58GB -60GB

128GB = approximately 110GB -120GB