BD-RE 4x, 3Pk Jewel Case - Memorex Blu-ray Disc Optical Media uses state-of-the-art blue-violet laser technology to support high-definition recording with excellent HD broadcast quality. Featuring storage capacities up to five times larger than todays standard DVDs and fast data transfer rates, Blu-ray Disc is ideal for consumers interested in recording in crystal-clear, high-definition quality. Blu-ray Disc is also great for many other high capacity data storage needs. Offering single-layer storage capacity of 25GB, BD dwarfs todays standard 4.7GB DVDs or 8.5GB double-layer discs.