TDK Life on Record BD-R Recordable Blu-ray Discs offer massive storage capacity & blazingly fast transfer rates. TDK Blu-ray Discs make it possible to back up large data directories, to record HD video, & to store large amounts of data, music & video all on one disc. The high-sensitivity inorganic recording material utilized by TDK BD-R Blu-ray Discs is completely different than the recording materials used for CD or DVD. Composed of copper & silicon, Cu Si recording material delivers remarkable, long-lasting performance. The recording material enables fast recording & playback speeds & also makes it possible to realize massive capacities through multi-layering. TDK Blu-ray Discs feature DURABIS 2 hard coating technology, which protects the disc surface against scratches & helps resists smudges from fingerprints, to provide error-free Blu-ray Disc performance.