The LG Super-Multi GH24NSB0 DVD Rewriter features a 24x DVD+R write speed, 48x CDR write speed and supports M-DISC for superior reliability in data storage. Designed for storage needs that demand consistency, the GH24NSB0 read and write in CD, DVD+R, DVD+RW, DVD RAM formats giving you the option to choose the media best suited for each task. Superior M-Disc support. The M-DISCTMuses a patent rock-like recording surface instead of organic dye to etch your data onto a disc. The M-DISC has been tested and proven to outlast standard DVDs currently on the market.