Chrome's Gemini Nano Quietly Eats 4GB of Storage
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- Google Chrome is automatically downloading a 4GB weights.bin file tied to the Gemini Nano on-device AI model into users' browser directories when certain AI features are enabled, eating into desktop storage without prominent notification.
- Gemini Nano powers Chrome AI features including scam detection, writing assistance, autofill, and suggestion tools, running locally rather than pulling from cloud-based models.
- Google buries its disclosure that 'Gemini Nano's exact size may vary as the browser updates the model' in a lengthy built-in AI guide rather than at the point users enable the features in Chrome.
- Chrome may re-download the weights.bin file after manual deletion unless users navigate to Settings > System and toggle off the On-Device AI option to fully remove the model.
- Google spokesperson Scott Westover told The Verge that Gemini Nano has been offered in Chrome since 2024, will automatically uninstall if the device is low on resources, and that in February the company began rolling out a settings toggle letting users easily turn off and remove the model.
Why it matters: Users on storage-constrained machines have been losing gigabytes to a file they may never have knowingly opted into, and the only reliable fix requires digging into Chrome's System settings. Google's response confirms the model has shipped since 2024 without a clear in-product prompt about its 4GB footprint, giving users new reason to audit what Chrome installs in the background.
