Which AWS service or resource should the company use to meet these requirements?

Explanations:

AWS Snowmobile is designed for transferring extremely large amounts of data (up to 100 PB) and is suitable for moving large on-premises data centers to AWS. It has the least operational overhead for such a massive data migration.

AWS Snowball Edge is suitable for transferring large amounts of data (up to 80 TB per unit) but is not ideal for migrating 50 PB of data, as multiple units would be required, increasing operational overhead.

AWS Data Exchange is a service for accessing and sharing third-party data, not for migrating on-premises data to AWS. It does not meet the requirement of migrating 50 PB of file storage data.

AWS Database Migration Service (AWS DMS) is primarily for migrating databases, not for file storage data. It is not suited for transferring 50 PB of file data.