Phys.org: High-speed laser writing method could pack 500 terabytes of data into
CD-sized glass disc.
[1]https://phys.org/news/2021-10-high-speed-laser-method-terabytes-cd-sized.html

References

   1. https://phys.org/news/2021-10-high-speed-laser-method-terabytes-cd-sized.html