There are three Versions :

Features

Storage Migration Service

Inventory

Admin selects nodes to migrate, Storage Migration Service orchestrator node interrogates their storage, networking, security, SMB share settings, and data to migrate

Transfer

Admin creates pairings of source and destinations from that inventory list, decides what data to transfer and performs one more or transfers

Cutover

The admin assigns the source networks to the destinations and the new servers take over the identity of the old servers. The old servers enter a maintenance state where they are unavailable to users and applications for later decommissioning while the new servers use the subsumed identities to carry on all duties.

Migrate files from Server 2003 and up!