ACASIS 2.5'' Portable External Hard Drive USB2.0

Interface Rate : 6Gb/s Shell Material : Plastic Launch Date : Feb-15 Has External Power Supply : No Expansion Port : None Cache : 8MB Products Status : STOCK Application : Server,Desktop,Laptop Interface Type : USB 2.0 Size : 2.5 #34; Model Number : FA-05U-2.0 Package : Yes Speed : 15000rpm HDD Capacity : 500GB - 750GB Brand Name : Acasis Origin : Mainland China Style : HDD Type : External Color : white Name : Acasis USB : 2.0 Acasis 500gb USB2.0 HDD 2.5 High-Speed External Hard Drives 1tb Storage Devices Desktop Laptop Mobile Hard Disk Support system: 98SE, ME, 2000, Vista, WIN7,WIN8Windows Specifications: Hard Drive Type:2.5 #34; HDD USB Interface:USB 2.0 Disk Rotational Speed:5400rpm Disk Cache Size:8MB 3 Years Warranty Package includes: 1* USB 2.0 External Hard Drives USB cable*1 About Capacity: 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. 40 GB=about 37GB 60 GB=about 55GB 80GB=about74GB 120GB=about 111GB 160GB=about 149GB 250GB=about 232GB 320GB=about 298GB 500GB=about 465GB 640GB=about 595GB 1TB=about 930GB 750gb=about698gb 2TB= about1860GB 1.5TB= about1395GB