Best practices when backing up remote sites

     Hi all,

could someone please tell what would be considered "best practice" backing up physical servers at remote locations to avoid inter-site bandwidth usage?

     In my scenario site A has BE 16 and site B has a Physical Server I'm looking to start backing up as well as B2D folder on a NAS server. The two sites are connected via SD WAN. In my current setup would I have any backup data traveling between the site A and site B or just the communications between BE 16 and BE Agent installed on the Physical server at site B?

Thank you!