Attention:
Every USB are real capacity,not update capacity,so each one can be test via H2 software.
Capacity detail :
Flash memory producers are using decimal arithmetic:
1KB=1000Bit, 1MB = 1000KB, 1G = 1000MB
And different factories will produce different capacity USB flash drives. So it is normal to has little capacity deviation!
2GB = approximately 1.7GB-1.8GB
4GB = approximately 3.6GB-3.8GB
8GB = approximately 7.4GB-7.8GB
16GB = approximately 14.1GB-15.0GB
32GB = approximately 28.1GB-29.0GB
64GB = approximately 58.5GB-59.0GB
128GB = approximately 110.0GB-117.0GB