The obvious answer is not to open large threads whilst you only pay for 5gb a month download.

I pay the money and have a 100gb download at a decent ISP for my PC.

I am very careful on my mobile and use wifi when I am at home to downlaod apps etc to it. That way, they do not form part of the mobile download. I have 15 gb per month on the mobile. However I don't go onto mudcat with my mobile.

You can't have it all.