640 GB ~ WESTERN DIGITAL CAVIAR BLUE SATA-II 7200 16 MB 3,5"" HDD [WD640AAKS-00A7B2]
640GB~WESTERN DIGITAL CAVIAR BLUE. It was a performance standout in its era because it utilises two 320GB high-density platters. In 2008, many competitors were still using three or four lower-density platters to reach similar capacities.