Acasis 500gb USB2.0 HDD 2.5 High-Speed External Hard Drives 1tb Storage Devices Desktop Laptop Mobile Hard Disk
98SE, ME, 2000, Vista, WIN7,WIN8，Windows
Hard Drive Type:2.5" HDD
USB Interface:USB 2.0
Disk Rotational Speed:5400rpm
Disk Cache Size:8MB
1* USB 2.0 External Hard Drives
2* USB cable*1
hard disk vendors are using decimal arithmetic: 1MB = 1000KB, 1G = 1000MB calculated
but the operating system is using binary arithmetic: 1MB = 1024KB, 1GB = 1024MB.
so there are some differences between display capacity and nominal capacity of hard disk products.
However, this is allowed to exist. Please do not doubt his authenticity.
That is : 1MB=1024KB, 1GB=1024MB
40 GB=about 37GB
60 GB=about 55GB