The network connection between the Tableau Server and the external file store should have high bandwidth and low latency For optimal performance, it's critical to ensure that the network connection between the Tableau Server and the external file store has high bandwidth and low latency. This minimizes data transfer times and improves the responsiveness of the server when accessing stored data. Option A is incorrect as having the external file store in a different geographical region can actually increase latency and reduce performance. Option C is incorrect because while having a separate backup system is good practice, it is not directly related to the performance of the external file store with Tableau Server. Option D is incorrect as the file system format compatibility is important, but it does not directly impact the performance in the context of an external file store's integration with Tableau Server.