AWS Transfer Family
AWS Transfer Family is a fully managed file transfer service that allows secure and scalable file transfers directly to Amazon S3 or Amazon EFS (Elastic File System) using widely adopted protocols. This service enables organizations to securely share files without managing the underlying infrastructure.
In AWS, you typically interact with S3 or EFS storage resources via the Transfer Family server. These servers communicate securely with backend resources using IAM roles to manage permissions. You can access files via a DNS name, with multiple file transfer protocols supported depending on your needs.

1. Supported Protocols
- FTP (File Transfer Protocol): A legacy, unencrypted protocol used in specific cases.
- FTPS (FTP Secure): FTP with TLS encryption for secure file transfers.
- SFTP (SSH File Transfer Protocol): Secure file transfer over SSH, widely used for secure data transfer.
- AS2 (Applicability Statement 2): Primarily used in industries requiring secure, structured business-to-business (B2B) data exchanges, such as supply chains and financial transactions.