Altiris Help Desk - How to archive ticket attachments?

We're currently running an Altiris 6.5 NS with Help Desk solution and have not changed the default location that Altiris stores its attachments. The drive we store these attachments on is starting to get full and we're wondering if there is a best practice on archiving these attachments (or just on storing/managing them in general). If anyone knows of a best practice for this, or if you could just share how you are dealing with this issue yourself, I would greatly appreciate it.