I've been told my inbox is full. How do I empty it and can I save the messages in another file? or will that exceed my storage allowance? A lot of my messages contain useful info and I don't want to lose it.
You tick the ones you want to delete, then choose the "delete" action from the box at the bottom. I don't think you can store them anywhere else at ybw.com; there may be a bulk-download option but I'm not aware of one.
Don't you have the ones sent to you in your email account? I save a lot of the ones I've sent because there's no other copy, but I freely delete old incoming PMs because it's easier to find them in my email anyway.