About REAL Capacity

Capacity flash memory products are usually
shipped in accordance with 1MB = 1000KB, 1G = 1000MB computing, but the
operating system using binary arithmetic 1MB = 1024KB, 1GB = 1024MB, so there
are some differences between the display capacity and standard capacity memory
products.This is calculation difference between manufacturer and our PC

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

256GB=approximately 230GB-238GB

512GB=approximately 460GB-476GB

The most reliable software to verify memory is H2testw.