A customer has a Dell EMC Unity 500 at their headquarters location. They want to deploy a UnityVSA in a remote/branch office environment to run an instance of a mission-critical financial application. In addition, they want to ensure that headquarters and the branch offices share the same information by using asynchronous replication. Finally, the customer wants to add 10 TB of capacity in the next 6 months.
Since a Professional Edition subscription with the lowest storage capacity was purchased, what is the minimum upgrade subscription required?