Fix OneDrive Folder Creation Error 404 in Synology CloudSync
Question details
Synology CloudSync successfully uploads files but fails to create new folders in personal OneDrive accounts, returning an HTTP 404 error.
- Product
- Synology CloudSync / Microsoft OneDrive
- Device & OS
- not provided
- Scenario
- Synchronizing files and folders from a Synology NAS to a personal Microsoft OneDrive account.
- Observed behavior
- The application returns an HTTP 404 itemNotFound error during folder creation attempts, even when the intended parent folder already exists in the destination drive.
Verify that your Synology CloudSync package is updated to the latest version in the Package Center and ensure your NAS has an active, stable internet connection.
Test OneDrive Functionality and Reconnect the Account
Since personal OneDrive accounts use different APIs than Business accounts, refreshing the authentication token or verifying account limitations can resolve the issue.
In many cases, folder creation failures are account-specific glitches rather than software bugs. Personal OneDrive accounts may occasionally experience API restrictions that prevent third-party applications like Synology CloudSync from executing specific commands.
Open the native OneDrive mobile app or log into the OneDrive website to manually test if you can create a new folder. If this also fails, the issue is tied to your Microsoft account rather than Synology.
Open Synology DSM, launch CloudSync, select your OneDrive connection, and choose the option to unlink or remove the account.
Add a new connection in CloudSync, select Microsoft OneDrive, and sign in again to grant the application fresh permissions.
Contact Microsoft Support for Account-Specific Errors
If folder creation fails across multiple platforms including the native mobile app, you need to reach out to Microsoft Support to fix the backend account issue.
Seamlessly Manage and Edit Cloud Documents with WPS Office
If you are experiencing continuous API limits or synchronization errors with your current cloud and office setup, consider switching to WPS Office. It provides a lightweight, highly compatible alternative to Microsoft Office, integrating smoothly with multiple cloud services to ensure your workflow remains uninterrupted.
- 1. Download the software: Visit the official WPS Office website and download the free installation package for your operating system.
- 2. Install and launch: Run the installer, follow the on-screen prompts to complete the setup, and launch the WPS Office suite.
- 3. Connect your cloud: Sign in to your WPS account to access built-in cloud storage or link your preferred third-party cloud drives for seamless file management.
Frequently Asked Questions
Why does OneDrive return an HTTP 404 itemNotFound error when the parent folder clearly exists?
This error often indicates a desynchronization between the local client and the cloud server, or an API limitation restricting third-party apps from executing folder creation commands on specific personal accounts.
Are there different Synology CloudSync limitations for OneDrive Personal versus OneDrive for Business?
Yes. OneDrive for Business operates on different API structures that generally support comprehensive third-party synchronization. Personal accounts may face restricted API access, leading to occasional folder creation limitations.
What should I do if my OneDrive mobile app also refuses to create new folders?
If the native OneDrive mobile app fails to create folders alongside Synology CloudSync, the issue is strictly account-based. You must contact Microsoft Support directly via the OneDrive web interface to resolve the backend restriction.
