"#ProjectSilica is a working demonstration of a system that can read and write data into small slabs of glass. Main draw of the technology is that it takes no energy to preserve data and the data can be retrieved rapidly if needed. The #glass offers extreme stability, with experiments suggesting the #data would be stable for over 10,000 years at room temperature."

https://arstechnica.com/science/2026/02/microsofts-new-10000-year-data-storage-medium-glass