About Real Capacity

Why the USB flash drive real capacity is not correct capacity?

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

About Real Capacity

1GB = approximately 920MB-999MB

2GB = approximately 1.8GB-1.9GB

4GB = approximately 3.75GB-3.9GB

8GB = approximately 7.4GB-7.85GB

16GB = approximately 14.2GB-15.8GB

32GB = approximately 28.2GB-30GB

64GB = approximately 58GB-60GB