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.
16GB = approximately 14GB -15GB
32GB = approximately 28GB -30GB
64GB = approximately 58GB -60GB
128GB = approximately 110GB -120GB
256GB = approximately 220GB -240GB
512GB = approximately 450GB -480GB
This is a calculation difference between the manufacturer and your PC, please Google 'USB Flash Drive capacity' to get more information.
1. To avoid data loss or mechanical damage, do not power down your computer or unplug flash disk during transfer.
2. Please do not remove your USB flash drive when it is being used otherwise your data may be lost.
3. After using USB flash drive, it is better to remove it as soon as possible. That will help to extend its storage lifetime.
4. Please do not format your USB flash drive frequently, otherwise the USB will be damaged easily.