Smartbuy Features:Blu-ray disc has up to 10 times the storage capacity of a standard recordable DVD disc, suitable for recording, and playback high definition (HD) video contents. High Capacity: 50GB. Hard Protective Layer Coating.Extremely long archival life.Excellent playback performance.High definition television recording.Digital asset management and professional storage.Complies with Blu-ray Disc Recordable Format Version 1.3 for use with drives or records that support 50GB Blu-ray Disc.Precautions: 1. Avoid fingerprints, dust and other soiling on the disc. The disc can be cleaned with a soft, lint-free cloth. Don't use any solvents or protective liquid.2. Do not hit the edge of the disc.3. Protect the disc from excessive heat, moisture and direct sunlight.4. Please use soft felt-tip pens to label the disc.