Azure File Sync is a service that bridges your on-premises file servers and Azure cloud storage. It allows you to centralize your files in Azure Files, while still giving users fast access from their local Windows Servers.
What Is Azure File Sync?
Think of Azure File Sync as Dropbox for Azure. You can store your data in the cloud using Azure Files and then sync it to on-premises Windows Servers. This setup combines the scalability of the cloud with the performance of local access.
Users can download data locally on demand, and administrators can manage file access and retention policies through Azure.
Key Features
Cloud Tiering
Azure File Sync supports cloud tiering, which keeps frequently accessed files on your local server, while less-used files are stored in Azure. This helps save space on your server without limiting user access.

Local Server Integration
You can use Azure File Sync to transform a Windows Server into a local cache of your Azure file share. This allows your local server to:
- Serve files using SMB (Server Message Block), NFS (Network File System), or FTPS.
- Operate like a local file server while syncing all changes with Azure.
Multi-Site Support
Azure File Sync works across multiple Windows Servers in different locations. All servers stay in sync with the central Azure Files storage, which improves collaboration across sites.
Backup and Protection
Because your files are stored in Azure, you can protect them using Azure Backup. This simplifies data protection and recovery.
Benefits
- Combines cloud scalability with local performance.
- Reduces on-prem storage requirements.
- Allows consistent access to shared files across multiple sites.
- Supports disaster recovery and offsite backups.
For organizations already running Windows Servers, it offers an easy path to hybrid cloud adoption without completely replacing local infrastructure.
Conclusion
Azure File Sync is a flexible hybrid solution that connects your on-premises and cloud file storage strategies. It offers a familiar user experience while improving performance, resilience, and scalability.
Want to see Azure File Sync in action? Check out our AZ-900 video course for a guided walkthrough – or go back to the AZ-900 list of topics.
Please click here to find out more about Microsoft’s AZ-900 exam.