Your on-premises network has a 200-Mbps connection to Azure and contains a server named Server1 that stores 70 TB of data files. You have an Azure Storage account named storage 1. You plan to…

Storage Migration Service facilitates migrating file servers and shares but relies on network connectivity for data transfer, which is the bottleneck in this scenario, so it would not minimize the migration time.

Azure Storage Explorer is a client-side tool for managing Azure Storage and uses network transfer, which would not reduce the 35-day estimated transfer time for 70 TB of data.

Azure Data Box is the appropriate solution for migrating large volumes of data like 70 TB when network transfer times are prohibitive, as it allows you to physically ship data on secure, robust appliances directly to Azure data centers. This method bypasses network bandwidth limitations, significantly reducing the total migration time compared to online tools like AzCopy.

Azure File Sync is designed for ongoing synchronization and cloud tiering of file shares, not for an initial bulk migration of 70 TB that needs to be expedited due to network limitations.