How would that change if you had, say, 5,000 friends – the fb limit, which some people do reach – who were posting multimedia content multiple times a day (whic

How would that change if you had, say, 5,000 friends – the fb limit, which some people do reach – who were posting multimedia content multiple times a day (which happens on fb)? Is the protocol set up in such a way as to enable easy, automatic deletion of old data from local devices, while still storing them for easy search/scroll-based access on the Pub servers?