<P> The total capacity of HDDs is given by manufacturers using SI decimal prefixes such as gigabytes ( 1 GB = 1,000,000,000 bytes ) and terabytes ( 1 TB = 1,000,000,000,000 bytes ) . This practice dates back to the early days of computing ; by the 1970s , `` million '' , `` mega '' and `` M '' were consistently used in the decimal sense for drive capacity . However , capacities of memory are quoted using a binary interpretation of the prefixes , i.e. using powers of 1024 instead of 1000 . </P>
<P> The total capacity of HDDs is given by manufacturers using SI decimal prefixes such as gigabytes ( 1 GB = 1,000,000,000 bytes ) and terabytes ( 1 TB = 1,000,000,000,000 bytes ) . This practice dates back to the early days of computing ; by the 1970s , `` million '' , `` mega '' and `` M '' were consistently used in the decimal sense for drive capacity . However , capacities of memory are quoted using a binary interpretation of the prefixes , i.e. using powers of 1024 instead of 1000 . </P>
the amount of storage available on a hard disk drive is measured in
the amount of storage available on a hard disk drive is measured in
decimal prefixes binary interpretation of the prefixes
decimal prefixes binary interpretation of the prefixes