How is SFTP/Enhanced FTP configured in Marketing Cloud, and what are best practices for file-based automation?

SFTP setup: Each Marketing Cloud account includes an Enhanced FTP (EFTP) server. Access is configured in Setup under Data Management > FTP Accounts. Username and password authentication is supported; SSH key-based authentication (preferred for security) requires uploading the public key in the FTP account settings.

Directory structure: The EFTP server has standard directories: /Import for files to be imported, /Export for data extract outputs, /Triggered Sends for triggered send batches.

File Drop trigger: Automation Studio's File Drop trigger monitors a specific EFTP directory and file name pattern; when a matching file is detected, the automation starts automatically.

Best practices:
• Use SSH key authentication instead of passwords.
• Rotate FTP credentials regularly.
• Use unique file naming conventions with timestamps to avoid collisions.
• Implement file import activities with error notification alerts.
• Delete or archive imported files after processing to keep the EFTP tidy.