Set up network shared storage that is accessible by all nodes in the cluster For Tableau Server to utilize an external file store effectively, it's crucial to set up a network shared storage solution that is accessible by all nodes in the cluster. This ensures that data is readily available to all components of the Tableau Server, maintaining consistency and reliability in data access and management. Option A is incorrect because configuring FTP access is not a standard or secure method for integrating an external file store with Tableau Server. Option B is incorrect as enabling SSL on the Tableau Server, while important for security, does not directly relate to the accessibility of the external file store. Option D is incorrect since increasing the virtual memory of the Tableau Server does not affect its ability to access an external file store.