Catering to users that demand increased data storage, ASUS, a leading provider of high-performance optical storage devices, today announced the new DRW-20B1S/B1ST – an industry leading DVD rewriter that supports 12X DVD-RAM write, 20X DVD+/-R and 12X DVD+/-R double layer media sources. It also features Optimal Tuning Strategy – a technology that automatically adjusts burning for optimum disc backups; and E-Green Engine for great energy savings.