05-28-2015 09:48 AM
that is the capacity after formatting. Storage manufacturers define 1GB as 1 billion bytes. Operating systems however define a GB as 2 to the 30th power. It has always been this was since computers were invented. Even your HDD will show a smaller formatted capacity than the actual drive raw storage capacity. see the knowledgebase article below.
Capacity of the device (as reported by many operating systems) does not match its label
Why is the capacity of my device (as reported by many operating systems) different than the capacity that is listed on its label?
Definitions of a Megabyte:
Note: Some capacity is used for formatting and other functions and thus not available for data storage.