You got one person filling the pages on a daily basis, I'm not surprised that it's full.
Is it possible that you're confusing bandwidth with storage? Two different things, bandwidth (or sometimes referred to as throughput) is an instantaneous measurement of the traffic flow (usually expressed in terms of megabits per second, or Mbps). Storage is the amount of forum data that is retained by the servers.
Not sure why there was a bandwidth problem a while back, but it seems to have been resolved.