Why Chrome may have quietly downloaded a 4GB file to your PC - and how to get rid of it

Lance Whitney/ZDNET

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ZDNET's cardinal takeaways

• Google is downloading a 4GB record to the PCs of galore Chrome users.
• The record is harmless and is utilized for the Gemini Nano on-device LLM.
• You'll spot it if you've opted into the on-device AI mounting successful Chrome.

Google is silently redeeming a Chrome-related record to galore computers. That's thing earth-shaking. But this record is simply a hefty 4GB successful size, which has caught the attraction of immoderate Google watchers. What is the file, wherefore is it being installed, and however tin you cheque for it?

Also: I fto Chrome's AI cause shop, research, and email for maine - here's however it went

In a new blog post, machine idiosyncratic Alexander Hanff, aka the Privacy Guy, pulled backmost the curtain connected this mysterious file. Named weights.bin, the record is being downloaded heavy wrong the idiosyncratic information folder of galore Chrome users. The record itself is related to Gemini Nano, which Google is utilizing arsenic the on-device AI exemplary for Chrome users.

If you delete the file, it comes back

Though there's thing risky oregon unsafe astir the file, Hanff and others person expressed concerns that it's being downloaded without users' cognition oregon permission. And if you delete the file, it yet comes back, Hanff said. That by itself is hardly alarming; that's portion of immoderate bundle update. Rather, immoderate of the disapproval centers connected the file's size. If you person ample hard disk space, past 4GB is apt not a large deal. But if you're moving low, that large a record mightiness chew up abstraction you can't spare.

Traditionally, AI models similar Gemini usage the unreality to interact with you. Submit a request, inquire a question, oregon footwear disconnected a conversation, and the AI taps into its online information and resources to respond. But that method tin beryllium dilatory and people requires that you beryllium connected. By traveling betwixt your instrumentality and the cloud, your information tin besides beryllium exposed.

A inclination has emerged successful which companies are experimenting with locally stored LLMs (large connection models). That not lone speeds up the process, but it besides means you tin usage the AI offline and much securely. Gemini Nano has already been in play connected Google's ain Pixel phones.

That explains wherefore the record is truthful large; it has to battalion successful a batch of data. In this case, a weights record contains numbers that measurement the level of value an AI exemplary assigns to your input. The AI uses these values to find what should travel next. For example, let's accidental you commencement typing the operation "Why did my caller telephone outgo maine an limb and a…" astatine the prompt. The AI assigns weights to your input to assistance it foretell that the adjacent connection would beryllium "leg."

Also: This almighty Gemini mounting made my AI results mode much idiosyncratic and accurate

How tin you archer if the record has been downloaded to your PC? First, unfastened Chrome, spell to Settings, and prime System. On the System screen, cheque whether the On-device AI enactment is turned on. If so, past you astir apt person the record oregon volition soon get it.

To double-check, you'll person to navigate to the idiosyncratic folder connected your PC. That determination varies based connected your operating system. On my Windows 11 PC, I ran a hunt successful File Explorer for weights.bin. The hunt took a agelong travel done the pursuing path: C:\Users\lance\AppData\Local\Google\Chrome\User Data\OptGuideOnDeviceModel\2025.8.8.1141. At that last location, the weights.bin record appeared, measuring 4GB.

Since the record is downloaded again if you simply delete it, you'll person to instrumentality an other measurement to get escaped of it permanently. After you delete the file, spell backmost to Settings successful Chrome and prime System. Then  turn disconnected the power for On-device AI.

But arsenic agelong arsenic you person capable disk abstraction (and if you can't spare 4GB, past it's clip to cleanable up your drive), the record is small origin for concern. Just hide astir it, particularly if you're keen to effort on-device AI, and we'll spot what the aboriginal holds for Gemini Nano.