SAMSUNG USB 3.1 Flash Drive Disk Metal Mini Pen Drive
About REAL Capacity
16 GB = approximately 14GB-15GB32GB = 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 1 GB = 1.00 Billion bytes.
1) About USB Flash 3.0, please use a USB 3.0 USB Flash Drive to connect a USB 3.0 interface for the H2testw on your PC.
About USB Flash 3.1, 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) Actual speed may vary depending on host device conditions (card reader, adapter, USB port etc.) Write speed will be slightly lower