For years, OneDrive sync has been limited to 300,000 items. That limit is now increasing to 1 million items per device, starting with Public Preview in late April 2026.
This update applies only to devices that meet specific hardware requirements. Others will continue with the existing limit.
OneDrive 1 Million Item Limit: What Changes
OneDrive for Business, personal OneDrive accounts, and SharePoint libraries can now support up to 1 million synced items per device.
This introduces a two-level capacity model:
- Supported devices can sync up to 1 million items
- Unsupported devices remain at 300,000 items
There is no impact on existing sync configurations. Devices that do not qualify will continue operating normally.
Benefits of 1 Million OneDrive Sync Capacity
1. Sync large SharePoint libraries without splitting
Organizations with large document repositories can now sync more content locally without dividing libraries or relying on browser access.
2. Improved support for development and media workloads
Large codebases, asset libraries, and datasets can be managed within a single sync scope.
3. Better offline access in hybrid work environments
Users can keep more files available locally, reducing dependency on selective sync.
OneDrive Sync Hardware Requirements for 1 Million Items
The increased sync limit depends on system performance.
To support 1 million items, devices need:
- Sufficient memory for metadata tracking
- Adequate CPU for background sync operations
- Available storage for large file volumes
Devices that do not meet these requirements will remain at the 300,000 item limit to maintain stable performance.
Admin Checklist for OneDrive Sync Limit Upgrade
Identify users affected by 300K sync limit
- Users nearing or exceeding 300,000 items
- Teams with large SharePoint libraries
Evaluate device readiness for expanded sync
- Operating system compatibility
- RAM and processor capability
- Available disk space
Review OneDrive sync configuration best practices
- Files On-Demand settings
- Known Folder Move configuration
- Network and sync policies
Plan OneDrive Public Preview rollout strategy
- Pilot with selected users on supported devices
- Or wait for General Availability based on risk tolerance
OneDrive Sync Performance Considerations in Preview
During the preview phase:
- Performance may vary for large read-only libraries
- Legal hold scenarios may require additional validation
Monitoring is recommended before full-scale deployment.
Conlusion
The OneDrive sync limit increase to 1 million items is a significant step forward, but it is not a universal upgrade.
Organizations that meet the required hardware criteria can unlock greater flexibility, reduce dependency on workarounds, and support larger datasets more efficiently. At the same time, environments with older or lower-spec devices will continue operating within the existing 300,000 item limit without disruption.
