The 'Snowball' device is the correct answer because it's purpose-built to physically transport substantial quantities of data into and out of the cloud infrastructure. This service is particularly useful when dealing with limitations in internet bandwidth or when transferring data would otherwise be time-consuming or costly. The 'Snowcone' device is more compact and suited for edge computing and data transfer jobs of a smaller scale. 'DataSync' is a service that facilitates online data transfers, without providing a physical transport solution. The 'Migration Hub' is more of a management tool to track applications during the migration but doesn't offer data transport. 'Simple Storage Service (S3)' does provide cloud storage but doesn't include a physical data transfer solution. 'Glue' is for data integration and does not involve physical data transfer devices.