Media settings
Packages root: The path where AM downloads all 3rd party applications. It can be local folder or a UNC path and it can differ from the content location path in Configuration Manager.
Email settings
Server and Port for the SMTP server AM uses to send email notifications
Default from address is the address AM uses to send email notifications
Credentials can be used if the SMTP server requires authentication to send emails
Test can be used to test functionality of the SMTP settings