The service designed for facilitating the movement and synchronization of on-premises data to cloud storage services on a scheduled basis is the optimal choice for this scenario. It enables automated data transfer workflows, which can be set up to occur at regular intervals, handling large datasets while minimizing the impact on the local environment. Using a gateway solution would include an unnecessary additional layer of storage virtualization and might not be as efficient for the described transfer task. A dedicated network connection service primarily offers enhanced bandwidth for a more stable and consistent network performance but does not automize data transfers. A streaming data service would be more suitable for real-time data feeds rather than scheduled transfers.