You can buy a disc rated to last 1,000 years, but the company that invented it survived for less than a decade. The Millennial Disc, or M-DISC, is a write-once optical format that physically engraves its data onto a synthetic, rock-like layer — avoiding the disc rot of standard optical storage media, which stores data with organic dye that can degrade over time. Unfortunately, Millenniata, Inc. filed for bankruptcy in 2016. While Verbatim still sells M-DISCs today, questions remain about whether the Blu-ray variants still use the same recording layer as the original.
Source: M-DISC promises 1,000-year data storage — its maker lasted under a decade