A company needs to move a very large number of files (millions) from its on-premises data center to AWS in a one-time migration. Which AWS service is best suited for transferring these files?
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Correct answer: AWS DataSync.
Why this is the answer
AWS DataSync is the best choice for this scenario. It is a data transfer service that simplifies, automates, and accelerates moving large amounts of data online between on-premises storage and AWS storage services, including Amazon S3, Amazon EFS, and Amazon FSx. It's designed for one-time migrations as well as ongoing replication. AWS Database Migration Service (AWS DMS) is used for migrating databases, not general files. AWS Migration Hub provides a single location to track migrations but doesn't perform the data transfer itself. AWS Application Migration Service (AWS MGN) is for rehosting applications by migrating servers, not for transferring millions of individual files.
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