A company recently created a disaster recovery site in a different AWS Region. The company needs to transfer large amounts of data back and forth between NFS file systems in the two Regions on a periodic basis. Which solution will meet these requirements with the LEAST operational overhead?

1. Use AWS DataSync.
2. Use AWS Snowball devices.
3. Set up an SFTP server on Amazon EC2.
4. Use AWS Database Migration Service (AWS DMS).