I haven't quite worked out how many PMs/Conversations you can store on MP but I am also interested in how long or how many PM/IMs you keep. Over on FT you could keep 500 or if you signed up for Flyertalk Premium you could get up to 2,500. So how many do you keep before you start deleting them. I had over 500 PMs on FT and plan to get under 100. Maybe some people don't save them at all. Just interested in others opinions.