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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteMicrosoft Research says data written inside glass could remain intact for more than 10,000 years at room temperature. That figure is a projection from accelerated-aging experiments—not the result of watching a glass sample for 10,000 years. In a 2026 Nature paper, the Project Silica team reports storing 4.8 TB in a 120 mm-square, 2 mm-thick glass sample. The technology remains a specialized research system, not a consumer storage product.
How can glass store digital data?
Project Silica uses femtosecond laser pulses to make microscopic changes inside glass. The system encodes incoming bits as symbols, then writes those symbols as tiny regions called voxels, which alter the glass’s optical properties. The 2026 paper describes both phase voxels and birefringent voxels.
Rather than placing data only on the surface, the system writes planes of voxels at different depths, stacking them into a three-dimensional volume. To read the data, an automated microscope camera images the voxel layers. Software uses machine-learning decoding and error correction to reconstruct the original bits. Redundancy across tracks and platters adds protection at the system level.
The glass itself is not a drive. Writing and reading require specialized laser-based equipment, and the research account describes the writer and reader as research-grade systems. Microsoft’s 2026 work extends the earlier material from fused silica to borosilicate glass and reduces reader complexity to one camera; it does not mean ordinary borosilicate items can store data.
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What did Microsoft demonstrate in 2026?
The published figures below describe the research system, not retail specifications or guarantees for individual users. The 4.8 TB result applies to a particular sample size and thickness; it should not be mixed up with an older figure on Microsoft’s project page for a different, DVD-sized platter configuration.
| Measure | Reported result | What it means |
|---|---|---|
| Capacity | 4.8 TB in a 120 mm-square, 2 mm-thick glass sample | The specific sample configuration reported in the 2026 paper. |
| Recording density | 1.59 Gbit/mm³ across 301 layers | The density and layer count reported for the research system. |
| Write throughput | 25.6 Mbit/s per beam | The demonstrated write regime, limited by the laser repetition rate. |
| Write energy | 10.1 nJ per bit | The paper’s reported write-energy efficiency. |
| Projected stability | More than 10,000 years at room temperature | An estimate based on accelerated-aging experiments, not direct observation over that period. |
All figures in the table come from the Microsoft Research Project Silica team’s 2026 paper, “Laser writing in glass for dense, fast and efficient archival data storage”.
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Is the 10,000-year lifespan measured or projected?
It is projected. Microsoft says the team developed accelerated-aging tests on written glass and used them to estimate how long the data should remain intact at room temperature. No data-storage experiment can directly verify a 10,000-year claim on that timescale; the figure is an extrapolation from the accelerated tests, not a guarantee or a measured real-time lifespan.
Richard Black, Partner Research Manager at Microsoft Research, described the result this way in the company’s 18 February 2026 update: “We have unlocked the science for parallel high-speed writing and developed a technique to permit accelerated aging tests on the written glass, suggesting that the data should remain intact for at least 10,000 years.” The qualification “suggesting” reflects the estimate’s experimental basis.
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Can you buy Project Silica storage?
Microsoft’s 18 February 2026 update says the research phase is complete and describes proof-of-concept demonstrations, including storing Warner Bros.’ Superman on quartz glass and a collaboration with the Global Music Vault. It does not announce a consumer product for sale. The available project information does not identify household media or hardware that consumers can buy to use Silica.
Microsoft’s 2026 update presents Silica as research, while its project overview describes archival storage as part of a purpose-built library and cloud-facing system. An earlier SOSP paper discusses system design in which logical overwrites and deletions can be handled through metadata and encryption-key practices; that is design context from the earlier architecture, not a promise about every implementation.
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What the results do—and do not—show
Silica’s results address a specific archival-storage problem: keeping data in a durable medium that can be read using a specialized system. They do not establish that glass storage is cheaper or more practical overall than tape or disks. A fair comparison would need equivalent figures for capacity per medium, read and write throughput, media and system cost, retention evidence, and the maintenance or migration required over time. The published results cited here do not provide a current like-for-like total-cost comparison.
For now, the defensible takeaway is narrower: Microsoft’s 2026 research demonstrates high-density data storage in a small glass sample and estimates more than 10,000 years of room-temperature stability from accelerated-aging tests. It is not a product specification, consumer guarantee, or indication that a reader can deploy the technology at home.
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Sources
- Microsoft Research Project Silica Team, “Laser writing in glass for dense, fast and efficient archival data storage,” Nature 650, 606–612, published 18 February 2026.
- Richard Black, “Project Silica’s advances in glass storage technology,” Microsoft Research blog, 18 February 2026.
- Microsoft Research, Project Silica overview.
- Microsoft Research, “Project Silica: Towards Sustainable Cloud Archival Storage in Glass,” SOSP 2023 paper.
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