Western digital wd a leader in manufacturing high quality and reliable storage solution has just made available the wd green 4tb wd40ezrx 35 inch hard drive the new wd green 4tb sata 6 gbs features intellipower with 64mb cache and is design for desktop pc that needs energy efficient but high capacity storage drive the wd green 4tb offers 4000gb of unformatted space and yields around 36tb of usable capacity in a windows ntfs format see specs price and where to buy below wd green