strategyonly
C2C Supreme Commander
Just saw on moddb it says C2C is ~1GB. Strange, was pretty sure the download page here on civfanatics said something like 400mb.
The download size has nothing to do with the mods you download, ok.
Each mod uses (usually) a different archive zipper.
C2C once extracted is over 2ishGB in size, so its HUGE. It will test the boundaries of your PC.