Interface Type: Serial SATA 3
Body size: 3.5 inches
In the computer 1GB = 1024MB, and hard disk manufacturers are usually in accordance with 1GB = 1000MB conversion. To 120GB hard drive as an example:
Vendor capacity calculation method: 120GB = 120,000MB = 120,000,000KB = 120,000,000,000 bytes
Converted into an operating system. Calculation method: 120,000,000,000 bytes / 1024 = 117,187,500KB / 1024 = 114,440.9MB = 111.8GB.