Blueendless Ultra Slim Portable External Hard Drive USB3.0 500GB 750GB 1TB 2TB Hard Disk for Laptop Desktop PC Disk Drive

Blueendless Ultra Slim Portable External Hard Drive USB3.0 500GB 750GB 1TB 2TB Hard Disk for Laptop Desktop PC Disk Drive

System requirement : windows 7,window8,vista,2000,ME,windows98
Products list: External hard disk *1 cable*1
Warranty: 3 years
HDD LED: YES

Hard disk vendors are using decimal arithmetic: 1MB = 1000KB, 1G = 1000MB calculated
Our computers and card readers use the binary system for size calculation and here is where the missing bytes are .
That is : 1MB=1024KB, 1GB=1024MB
60 GB=about 55GB
80GB=about 74GB
120GB=about 111GB
160GB=about 149GB
250GB=about 232GB
320GB=about 298GB
500GB=about 465GB
640GB=about 595GB
1TB=about 930GB
2TB=about 1860GB