Gadolinium Gallium Garnet Quantum Electronic Processors (GGGQEP)

Gadolinium Gallium Garnet (GGG, Gd₃Ga₅O₁₂) Quantum Electronic Processors (QEP) are a hypothetical electronic circuit that operates by stimulation of quantized radiation through the medium of a gadolinium gallium garnet, a synthetic crystal. It was reported to be a data storage method by unknown persons, though there has been no public demonstration of such technology to date.

Reading

• A GUEST (13 Oct. 2012), GGGQEP, pastebin.com/ggEKXLVG, https://pastebin.com/ggEKXLVG, "The following is a theoretical data storage method that untilizes a sythetic crystal called 'GGG' or 'Gadolinium Gallium Garnet'. It is manufactured as a diamond sythetic, and is derived from 'Gadolinium Gallium Oxide'. These are transparent crystaline solids with a high hardness and density. With 3 powerful lasers, you burn out a point within the crystal, and with a scanning device... read data from it. You can only read and write; you cannot delete or rewrite the data." 
• xNikolau (20 Apr 2013), Deep Web Answers: Gadolinium Gallium Garnet Quantum Electronic Processors, kongregate.com, https://www.kongregate.com/forums/12-kongregate-multiplayer-games/topics/334889-gadolinium-gallium-garnet-quantum-electronic-processors#posts-7013226, "You only need three lasers to write the data and one to read. It’s the same technology as 3D glass etching. If you double its size to 10cm^3, then you have 8 times the storage, and even if you are not atomically precise, you could hold two internets."