Support files and Windows Azure Blobs
Add synchronization capabilities for the Windows Azure Blob Service. Allow data to be synchronized between storage accounts and allow on-premises file data to be synchronized with the Blob Service.
Bart X. Tubalinal commented
This should be possible with the Sync Framework. This link is old but should still be applicable: http://blogs.msdn.com/b/sync/archive/2009/12/03/synchronizing-files-to-windows-azure-storage-using-microsoft-sync-framework.aspx