Michael,
Your PM's fill fast, and you need to read, respond and delete. Save to sent if it's important, but then go to sent, and delete all but the last one. The thing saves every single PM in a chain, so the last one has it all, and they do take up a lot of room! I just hate to lose track of a guaranteed trade or gift or address.
Took me 4 years to learn how to work it. Got it down now!
Good luck sorting it out!
Suzi