A company needs to transfer 75 petabytes of data from its on-premises data centers to AWS. Which AWS service is the most cost-effective option for this volume of data?

AWS Snowmobile is the most cost-effective option for transferring 75 petabytes of data. Snowmobile is designed for exabyte-scale data migration, making it suitable for extremely large datasets (typically 10 petabytes or more). Its cost model is optimized for these massive transfers. AWS Snowball Edge Storage Optimized devices are for petabyte-scale data transfers, but 75 petabytes would require numerous devices, increasing complexity and cost compared to a single Snowmobile. AWS Direct Connect provides a dedicated network connection but is primarily for ongoing hybrid cloud connectivity and would be prohibitively expensive and slow for a one-time transfer of this magnitude. AWS Storage Gateway connects on-premises applications to AWS cloud storage but is not a data migration service for such a large initial transfer; it's for hybrid storage architectures.