Azure File Sync service is a service that help us to share files or data from on premises Windows server or cloud VM to Azure storage or vice versa.

Suppose, we have a on premises Windows Storage Server or Windows FTP Server and we all save or upload our files or document in a particular folder of this server, definitely who are belonging in a same network otherwise we cannot use this on premises server. Now we need to create a Storage Account in our Azure portal. After creating the Storage Account, we need to create a link between Azure storage and on premises server. 

Azure file shares can be used in two ways:

• Directly mounting these server less Azure file shares (SMB).
• Caching Azure file shares on-premises using Azure File Sync.

Advantages of Azure File Sync

• It help us to take a cloud backup
• Disaster recovery
• Easy and frequently access
• Multi-server access and sync
• Transition between on-premises and cloud
• Cost effective 
• Lift and shift

Configuration

• Create a Storage Account in your Azure portal
• Configure File Share in your Storage Account
• Create Azure File Sync
• Configure the Server Endpoints
• Create a Window 2012 Server on your local VM
• Create a folder and give it share permission
• Install Storage Sync Agent on Windows 2012 Server
• Create a Sync group
• Now Wrapping up