A team is moving an NFS dataset to AWS while the source remains active. It wants managed incremental transfer over the available network with validation. Which service should it evaluate?

1. AWS DataSync with supported source and destination locations and a planned final synchronization.
2. Only a one-time manual copy with no final change reconciliation.
3. Route 53 Resolver as the file-copy engine.
4. Use an S3 lifecycle policy to pull arbitrary on-premises NFS files.