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Yes, Copilot can work with files, but what it can access depends on which Copilot you mean. The Copilot app on Windows can search supported files on that PC, including files synced from OneDrive. Microsoft 365 Copilot can use organizational Microsoft 365 content when the account, license, permissions, and admin settings allow it. Both products can also support file-specific workflows such as attaching or selecting a document, but those routes have different limits.
What is the difference between Windows Copilot and Microsoft 365 Copilot?
“Copilot” refers to several product experiences. Here, Windows Copilot means the Copilot app on a Windows device, while Microsoft 365 Copilot means Copilot features grounded in Microsoft 365 work content or built into Microsoft 365 apps. Their file access is not a simple local-versus-cloud distinction: Windows file search can include OneDrive-synced files, and Microsoft 365 experiences can also work with files that a user explicitly attaches or selects.
| Comparison | Copilot app on Windows | Microsoft 365 Copilot |
|---|---|---|
| Main file context | Files on the Windows device, including OneDrive-synced files. | Organizational Microsoft 365 content when the account, license, and settings support work grounding; attached or referenced files may also be available in relevant flows. |
| Typical route | File Search and File Read settings in the Windows app. | Work grounding, Microsoft 365 apps, OneDrive file workflows, or an explicit file attachment/reference, depending on the feature and account. |
| Format and task limits | Microsoft lists .docx, .xlsx, .pptx, .txt, .pdf, and .json as readable formats; broad file search is not the same as readable content. | Supported formats and operations vary by app and task. OneDrive questions and comparisons have their own limits. |
| Access controls | Windows app settings control file-search and file-read access. | Organizational permissions, Microsoft 365 controls, sensitivity protections, and admin settings apply. |
| Availability | Requires the Windows app and relevant settings on the device. | Depends on account type, subscription or license, app, admin policy, and feature rollout. |
These distinctions follow Microsoft’s documentation for Copilot on Windows, Windows file search and read, and Microsoft 365 Copilot.
Can Copilot on Windows find and read files on your PC?
Search includes OneDrive-synced files
Microsoft says the Copilot app on Windows can find and open files on the device and answer questions about file contents. That includes files synced from OneDrive, so “on your PC” does not mean only files stored exclusively on the local drive. Availability depends on the app’s file-search and file-read settings.
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Readable formats are a narrower list than searchable files
Microsoft specifically lists .docx, .xlsx, .pptx, .txt, .pdf, and .json as formats Copilot on Windows can read. Do not assume that every file it can locate can also be interpreted: Microsoft distinguishes broader file search from the formats it documents as readable. If a file is not in a listed format, the documentation does not establish that Windows Copilot can read its contents.
Check the Windows app’s file settings
Open Copilot’s settings and review the file-search and file-read access controls. If Copilot cannot find a file, confirm that it is in a supported location and that the relevant access is enabled. If it finds but cannot answer questions about one, check whether its format is among the documented readable types.
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Can Microsoft 365 Copilot access OneDrive and work files?
Work grounding depends on account and license
With organizational grounding enabled, Microsoft 365 Copilot can draw on authorized work data through Microsoft 365, including organizational files and other work content. This is not an automatic entitlement for every account described as “Copilot”: access depends on the assigned license and configuration. More limited chat access does not necessarily include the same Microsoft Graph grounding available with a Copilot add-on license. Microsoft describes the distinction in its Microsoft 365 Copilot overview and licensing guidance.
Personal Microsoft 365 file workflows are different
Microsoft documents Copilot workflows for personal Microsoft 365 plans that use OneDrive files and files in Microsoft 365 apps. Supported operations and formats vary across Word, Excel, PowerPoint, OneNote, and Outlook. In the documented personal-file workflow, a local file path is not supported: the file needs to be uploaded or hosted in the cloud. These personal subscription features should not be confused with broad access to an organization’s Microsoft 365 content.
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Microsoft also documents some access to work documents in apps for certain personal Microsoft 365 subscriptions. That does not make the experience equivalent to a work or school account assigned a Copilot add-on: the documented capability differs particularly for broader organizational Graph access and questions about other documents. Identity, organizational policy, permissions, and audit controls continue to apply. See Microsoft’s Copilot guidance for Microsoft 365 apps.
What can Copilot do with selected OneDrive files?
Microsoft documents OneDrive workflows for asking questions about selected files, getting summaries, and comparing files. In the cited question and comparison flows, users can select up to five files. Eligibility depends on having a supported personal plan or a work or school account with a Copilot license. Microsoft says availability is rolling out, so these features may not be available to every eligible user everywhere. The documented question and comparison workflows do not support videos or images. Details are in Microsoft’s OneDrive Copilot instructions.
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What files can each Copilot access—and through which route?
- Windows device search: Use the Copilot app’s file-search capability for files on the device, including OneDrive-synced files. Check the app’s file access settings.
- Windows file reading: Ask about file contents when the file is in a format Microsoft lists as readable: .docx, .xlsx, .pptx, .txt, .pdf, or .json.
- Specific file in a prompt: Attach or explicitly reference a file where the product flow supports it. This is a file-specific route, not proof that Copilot has general access to your other files.
- Personal Microsoft 365 files: Use the documented OneDrive or Microsoft 365 app workflows; local paths are not supported in the cited personal-file workflow.
- Organizational work context: Use Microsoft 365 Copilot with the appropriate work account, license, and configuration. It can ground responses in work data the user is authorized to access.
The route matters as much as the file’s location. A cloud-hosted file might be usable through a particular OneDrive or Microsoft 365 app workflow without being available to Windows device search, while a synced file can be part of Windows search without giving Copilot broad access to the organization’s other files.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How do permissions and data protection limit Microsoft 365 Copilot?
Microsoft says Microsoft 365 Copilot operates within the Microsoft 365 service boundary and honors existing access controls. It does not grant a user rights to files they could not otherwise access. SharePoint and OneDrive discovery settings, sharing and membership controls, sensitivity labels, and information-protection policies can affect what Copilot can discover or reference. In some cases, sensitivity permissions prevent Copilot from extracting or interacting with file contents. See Microsoft’s privacy and protections guidance.
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- Brilliant Display – Stunning 13.8" PixelSense touchscreen[1], with brilliant LCD display[2], unleashes luminous whites, deeper blacks and colors so richly saturated bringing vivid life into every frame – perfect for work, school, streaming and creative tasks.
- Power that lasts all day – With 20 hours of battery life[3], the new Surface Laptop powers through your entire day, so you can create, work and stream from morning to night without reaching for a charger.
- Work at the speed of your ideas – Built with the latest Qualcomm Snapdragon X2 Elite (12 Core) processors, Surface Laptop delivers fast, AI‑accelerated performance—making it the most powerful Surface laptop for everything from multitasking to demanding workloads.
- The ports you need – Charge on-the-go, transfer data fast, or create the ultimate desktop set up with two USB-C / USB4[4] ports.
- Built-in AI Companion – Work smarter, create freely, and communicate with confidence—Copilot[5] on Windows 11 is always there to help.
Which Copilot should you use for a file task?
- Find a document on a Windows PC: Start with the Copilot app’s file search, then check file access settings and the documented readable formats.
- Ask about a selected OneDrive file or compare several: Use the OneDrive Copilot workflow if it is available for your account and plan.
- Ask questions across your work documents: Use Microsoft 365 Copilot with the required work license and organizational configuration; results remain bounded by your permissions and policy.
- Work with a particular file in chat: Attach or reference it if the active Copilot experience supports that route, rather than assuming Copilot can browse all files.
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