Which AWS service will meet these requirements?

Explanations:

AWS Snowball is specifically designed for transferring large amounts of data to and from AWS, especially in environments with unreliable network services. It uses physical devices to transport data securely to AWS, making it ideal for moving petabytes of data.

AWS DataSync is used for automating data transfer between on-premises storage and AWS but relies on a stable network connection. It is not suitable for environments with unreliable network services, especially for large data transfers.

AWS Direct Connect provides a dedicated network connection from on-premises to AWS. While it is reliable, it does not address the need for transferring large volumes of data from a remote location without a reliable network service, as it requires existing network infrastructure.

AWS Site-to-Site VPN creates a secure connection between on-premises networks and AWS. Like Direct Connect, it relies on existing internet infrastructure and is not suitable for transferring large amounts of data from remote locations with unreliable connectivity.