HNet allows for up to 100 messages to be stored. This is a combined total of sent and received messages. If you want to keep your old messages, you'll have to save them to your computer. To do this, simply go to your private messages, put a check/tick next to each message you want to save, and then scroll down to the "Selected Messages" button: You can download your messages as XML (a web mark-up language), CSV (Comma Seperated Values), or TEXT (a plain text file). Once you've safely downloaded them, select the "Delete" option to remove the saved messages. The red/yellow/green bar at the bottom of the messages page allows you to keep an eye on the number of messages you have.