A company wants scheduled transfers from a supported SaaS application into S3, with field mapping and managed connection configuration. It prefers not to maintain a custom connector for the supported source. Which AWS service is the most direct fit?

1. An S3 lifecycle policy containing the SaaS API URL.
2. AWS DMS as a universal connector for every SaaS REST application.
3. A Glue crawler alone, without any SaaS connector or ingestion step.
4. Amazon AppFlow using a supported source connector and S3 destination.