IRVINE, Calif., Sept. 3, 2013 /PRNewswire/ -- WD®, a Western Digital (NASDAQ: WDC) company and storage industry leader, today announced the expansion of its category-leading WD® Red™line of SATA hard drives specifically designed for home and small office NAS (network attached storage) systems with one- to five-drive bays. WD Red hard drives are now available in a 2.5-inch form factor offering 1 TB and 750 GB capacities and a new 3.5-inch 4 TB capacity. Powered by NASware™ 2.0 technology, WD Red is compatibility-tested with top NAS system manufacturers and optimized for performance and reduced power consumption. "WD defined the NAS drive category by leading the development of hard drives specifically built for small NAS environments," said Matt Rutledge, vice president of client storage for WD. "The WD Red product line serves the unique environment of NAS and meets the growing demand for affordable, reliable, and compatible storage. Through dialogue with our NAS partners and customer advocacy for WD Red, we saw the need for additional capacity in the 3.5-inch form factor and delivered our new 4 TB offering. We also wanted to deliver a highly reliable and compatible 2.5-inch hard drive built specifically for small NAS. This small form factor enables our customers to use high capacity NAS hard drives with high performance, quiet operation and low power consumption in compact NAS enclosures. We also see an opportunity in smaller-footprint NAS systems, media players and other industrial applications. Our pride in our product and our vision is shared with our customers." Top industry analysts see NAS continuing to represent one of the fastest-growing segments of the worldwide SOHO storage systems market. From both revenue and terabyte perspectives, NAS will continue to experience strong growth through the forecast period (to 2015), driven by a major shift of storage deployments toward IP-connected systems (Worldwide Personal and Entry Level Storage Tracker IDC 2013).