Ritek RiData DL DVD+R Double/Dual Layer, 8.5GB on a Single-Sided Disc -- No need to flip the disc! The DL DVD+R (dual-layer) media is the newest technology breakthrough in optical discs. The advanced, single-sided disc has an amazing 8.5GB of storage capacity, enough for up to four hours of DVD-quality video, 16 hours of VHS-quality video, or over 120 hours of MP3 audio. It is compatible with all current DVD video players and DVD-ROM drives as well as new DVD+R DL drives, the disc is ideal for virtually any business or household application. New technology allows material to be either read or recorded on one layer without affecting material on the other layer. An important advantage of the double-layer configuration is convenience. It allows users to read, write, or view nearly twice the amount of data than with the currently popular single-layer 4.7GB DVD discs without having to flip sides or change discs.