32GB = approximately 28GB-30GB
64GB = approximately 58GB-60GB
128GB = approximately 119GB-120GB
256GB = approximately 230GB-238GB
This is calculation difference between manufacturer and your PC, please Google ‘Memory card capacity’ to get more information.
For your reference
Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1GB = 1.00 Billion bytes.
Product Type :USB 3.1 Flash Drive FIT Plus
Application: PC, Notebook
Capacity :32GB/64GB/128GB/256GB(1GB=1Billion byte) * Actual usable capacity may be less (due to formatting, operating system, applications or otherwise)
Interface: USB 3.1
Connector : Type-A
Dimension (WxHxD) : 23.60 X 18.80 X 7.30mm
Weight: Approx. 3.1g
Features: Waterproof, Temperature-proof, Magnetic-proof, X-Ray-proof, shock-proof
1) Please use a USB 3.1 USB Flash Drive to connect a USB 3.1 interface for the H2testw on your PC.
If you use a USB 2.0 interface, the speed will be much slower because:
The bandwidth of USB 2.0 is 480 Mb/s, whereas the bandwidth of USB 3.0 is 5 Gb/s.
2) You should find transfer speeds of up to 200 MB/s. Actual speed may vary depending on host device conditions (card reader, adapter, USB port etc.) Write speed will be slightly lower.