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Not with the standard Windows clients alone. Google Drive for desktop can use its own configurable virtual drive letter; OneDrive uses a synced folder in File Explorer; and 坚果云 (Jianguoyun) syncs selected cloud folders to a local path. The official instructions for these services do not describe combining all three into one native drive letter. A third-party multi-cloud tool might offer a unified mount, but its support for each provider and its file-handling behavior must be checked before relying on it.
What each service shows in Windows
| Service or approach | Windows view described in official documentation | What it does not establish |
|---|---|---|
| Google Drive for desktop | A virtual drive with a configurable letter, such as G:. [Google Drive Help] | That the Google Drive mount also includes OneDrive or 坚果云. |
| OneDrive desktop client | A OneDrive folder in File Explorer; Files On-Demand can show online-only files and let you choose files or folders to keep on the device. [Microsoft Support] | A virtual cloud drive letter or a mount shared with the other services. |
| 坚果云 Windows client | Selected cloud folders synchronized to a local path chosen in the client. [坚果云帮助中心] | A drive-letter mount or an integrated mount for all three services. |
| Third-party multi-cloud tool | Potentially a single mount or a unified navigation surface, depending on the tool. | Whether a particular tool currently supports all three providers, account types, offline use, and reliable file changes is not established by the cited provider documentation. |
A unified navigation view is not necessarily a unified storage location. Files may still live in separate cloud accounts, and a tool that displays them together may not give them one shared backend or identical offline behavior.
Can Google Drive’s letter be used for all three?
No. Google’s setting changes the letter assigned to Google Drive’s virtual drive; it does not merge other providers into it. In Google Drive for desktop, open Settings, then Preferences, and look for the option labeled Change Google Drive letter (Windows). Choose an available letter and apply the change. The exact controls can vary by app version and device management policy. [Google Drive Help]
On a managed Windows device, an administrator may set the effective mount using the Google Workspace DefaultMountPoint setting. Google’s administrator documentation says that an administrator override can take precedence over user preferences; ask the organization’s administrator if the letter cannot be changed as expected. [Google Workspace Admin Help]
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OneDrive’s documented Windows setup creates a OneDrive folder in File Explorer. Files On-Demand lets online-only files appear there without taking up the same local space as downloaded copies. To have particular files or folders available without an internet connection, mark them to remain available on the device; downloaded content uses local storage. [Microsoft Support]
If storage is limited, Microsoft points users to Files On-Demand and selective sync. To move the OneDrive folder, Microsoft’s documented process is to unlink the PC, move the folder, and link OneDrive again; follow the current setup guidance for the installed client rather than assuming the folder can be moved by dragging it alone. [Microsoft Support]
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Microsoft’s external-drive guidance says removable USB drives are not supported as OneDrive storage locations. Its guidance describes a non-ejectable external storage source and filesystem requirements, so do not assume any external disk will work as the OneDrive sync location. [Microsoft Support]
How to choose a local sync path for 坚果云
坚果云’s Windows help says users on client version 7.0 or later can select a local synchronization path for a folder in the client. To move a folder that is already synchronized, its instructions say to cancel local synchronization first and then set a new local path. For Windows client version 4.0+, the help describes managing and moving the folder through the client. Use the instructions for your installed version because interface labels can change. [坚果云帮助中心]
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This is a local folder synchronization approach, not a documented drive-letter mount. Choosing a local path controls where synchronized content appears on the computer; it does not make that path a shared letter containing Google Drive and OneDrive.
What to verify before using a third-party unified mount
The official service documentation above does not confirm a particular third-party product that combines all three providers. If you evaluate one, check the following against its current documentation and your account types:
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- Provider and account support: Confirm that Google Drive, OneDrive, and 坚果云 are all supported, including the specific personal or organization accounts you use.
- What “one drive” means: Determine whether the tool creates one Windows mount letter, or only one app or navigation screen that links separate locations.
- Offline behavior: Find out which files are cached locally, how offline edits are queued, and what happens when the cache is full or the connection drops.
- Changes and conflicts: Check how edits, renames, moves, and deletions propagate, how simultaneous changes are handled, and how you can recover a mistaken change.
- Security and terms: Review the access permissions the tool requests, how it handles credentials and cached files, and whether its use complies with the relevant provider and organization terms.
Do not assume that a unified mount is equivalent to each provider’s official client. Verify a small, nonessential test folder before using it for important files.
Drive letters and sync folders are not a backup plan
A synced folder mirrors changes rather than automatically preserving an independent historical copy. Microsoft says additions, changes, and deletions in the OneDrive folder propagate to the cloud and vice versa. If deletion or an unwanted edit is synchronized, the cloud copy can be affected too. Keep a separate backup strategy if you need recovery from those changes. [Microsoft Support]
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Windows Disk Management can change the letter assigned to an eligible volume, but Microsoft warns against changing the letter of a volume containing Windows or applications because those programs may have trouble finding it afterward. Disk Management assigns letters to volumes; it is not a way to combine cloud services. [Microsoft Learn]
Quick Recap
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