LG GS40N DVD-Writer - Internal - DVD-RAM/�R/�RW Support - 24x CD Read/24x CD Write/24x CD Rewrite - 8x DVD Read/8x DVD Write/8x DVD Rewrite - Double-layer Media Supported - SATA - 5.25in - Slimline

Double-layer media supported; means that you will burn 2 different layers on the disc thus greatly increasing (literally doubling) the storage capability Copy your most favorite movies and music to the disc with this DVD-Writer