To create your migration phases, map your file share data to your new Google Workspace account. You need:
A mapping—Maps what content gets migrated in each phase. The content specified in a mapping is verified by Google Workspace Migrate.
An identity mapping—Maps an identity (for example, a user or a calendar resource) from the source domain to the target domain.
You also need a settings template. A settings template determines what types of content to migrate and how the data appears after a migration. You'll use a settings template in a later step.