I don't really understand what you're trying to ask, but
A PM always stores the messages you send, from the start to the end.
A private conversation does the same
I don't think the help chat and general chat do save data that old because that'd increase the load on the servers, therefore to keep it under control, much older messages are purged
I don't really understand what you're trying to ask, but
A PM always stores the messages you send, from the start to the end.
A private conversation does the same
I don't think the help chat and general chat do save data that old because that'd increase the load on the servers, therefore to keep it under control, much older messages are purged