The 2015-07-08 Azure Storage version includes the following features and updates:
Adds support for incremental snapshots for page blobs. Incremental snapshots are a cost-effective way to back up virtual machine disks if you want to implement your own backup solution.
To support incremental snapshots, the Get Page Ranges operation now exposes the
prevsnapshotparameter, which takes a
DateTimevalue that indicates an existing snapshot. By calling Get Page Ranges with the
prevsnapshotparameter, you return pages that have been updated or cleared since the snapshot that's specified by
prevsnapshotwas taken. You can then copy the pages that are returned to a backup page blob in another storage account by using the Put Page operation.