https://docs.microsoft.com/en-us/windows-server/storage/dfs-replication/dfsr-overview says "DFS Replication ... enables you to efficiently replicate folders (including those referred to by a DFS namespace path) across multiple servers and sites" What kind of folders is DFS designed to replicate? Is DFS meant to be a backup? Once replication occurs can folders be restored and if so how is the restoring done?