Microsoft's cloud computing business unveiled Project Silica, a cold-storage device that's designed to stand the test of time. Essentially an optical storage media, it is a 7.5 cm x 7.5 mm x 2 mm square piece of glass that can store up to 75.6 GB of data (inclusive of error-correction code). Unlike conventional optical media such as CD or Blu-ray, which relies on etching pits of different lengths on a plastic substrate to denote ones and zeros, project silica uses nanoscale gratings and deformations, while AI is used for error-correction to overcome any aging of the media. The company developed a proof-of-concept using quartz glass.
It's seems we've come full circle as some of the first recordings ever were made on glass photo negatives. This is very cool tech but I wonder why they didn't make the wafer large enough to hold 100 GB. That would be roughly equivalent to a dual layer Blu-Ray disc.