We are talking about a social network having lots of user content. Amazon S3 provides a system of distributed servers (network) which photos, videos, and files can be hosted on the Amazon server as your site, however, it's best to keep it separate.
Compatibility
This app is currently compatible with phpFox 4.6.0 or later
Product Information
Version: 4.5.4
Feature List
Store photos, videos, and files on the Amazon server as your site