Microsoft stores data on everyday glass for 10,000 years
Microsoft has built a glass-based storage system that can hold terabytes of data for at least 10,000 years, promising a new way to archive the world’s digital memory.
Summary
Microsoft researchers have unveiled a storage system that writes data into glass and is designed to last for at least 10,000 years. The work was detailed in a recent scientific paper and is presented as a potential answer to long-term digital archiving.
The system is part of Project Silica and uses ultrafast lasers to encode three-dimensional “voxels” inside small glass plates. Each 12-centimetre-wide, 2-millimetre-thick square can store 4.8 terabytes of data, roughly equivalent to two million printed books or 5,000 4K films.
A key shift in the latest prototype is the move from expensive fused silica to ordinary borosilicate glass, the same type used in some kitchenware. This change aims to keep the technology durable while making manufacturing more affordable and scalable.
In practice
The glass is written using a femtosecond laser that creates tiny three-dimensional structures, or voxels, which represent bits of information. These patterns are later read back using optical hardware and decoding software tailored to the way the data is encoded in the glass.
Stress tests show that the plates can withstand temperatures up to 290 degrees Celsius for more than 10,000 years, suggesting even longer lifetimes at room temperature. The material is also resistant to water, electromagnetic pulses and harsh environments, unlike magnetic tapes and hard drives that degrade within about a decade and must be replaced.
Once the data is written, the glass requires no energy to preserve it and does not need a tightly controlled data-centre environment. The storage is inherently write-once: it cannot be hacked or modified after inscription, and the reading process cannot accidentally overwrite or erase the stored information.
Microsoft has not shared a commercial launch date, but internal plans point to pilot deployments for government archives and scientific research as early as 2027. Before that, the team must continue working on faster writing speeds, manufacturability at scale and practical ways to access data stored on glass in everyday workflows.
Limitations
Outside experts have praised the progress while stressing that important hurdles remain. A commentary by two researchers highlights the need to increase write speeds, improve mass production and ensure that information stored in glass remains easy to access over time.
There are also questions about how this technology can be integrated into existing data-centre operations, which are built around media that can be rewritten and replaced regularly. Shifting to a write-once, centuries-long medium will require new approaches to how archives are organised and managed.
Even so, some scientists describe the system as a viable way to safeguard records of human civilisation, comparing it to historical shifts such as oracle bones or medieval parchment. One long-time glass-storage researcher says the work shows how the technology could fundamentally change the data-centre industry.
Why it matters
- Offers a path to archiving critical data for thousands of years without constant migrations.
- Could cut energy use for long-term “cold” storage by removing the need for climate-controlled facilities.
- Provides tamper-resistant media for sensitive cultural, scientific and government records.
- Forces companies and institutions to rethink how they design archives in an era of exploding data volumes.