Hi Chin Leng
Personally i feel that certain threads in your forum has to be 'house keeping'. I think this will help you on the 'band width'.
I notice that some thread has as many as few hundred pages, will one go and read such items from page 1 to 100? My suggestions is that you can delete page 2 onwards to maybe page 90 and so on. People usually follow the first thread to understand what the topic is all about before going to the final one to follow through.
I also notice that there are only 1 thread posted by some mothers and nobody reply, it lasted for a few months, perhaps you want to house keep such threads as well. 1 thread help you on the bandwidth, so if you have 1000 of such 1 thread, you have more spaces, don't neglect these.