The M-Disc is the world's unique, durable, and reliable storage medium that enables permanent data archiving. It is the only disc that has passed the stringent long-term archiving tests of the U.S. Department of Defense. Thanks to its patented, stone-like material, data is literally engraved into the recording layer. This physical change in the medium allows the contents stored on the disc to be archived for up to 1,000 years. The inorganic layer also ensures that no special precautions are needed during storage, as there is no influence from temperature, humidity, or sunlight. BD-R M-DISC media can be written to and read by all Blu-ray recorders.