Kodi using tons of internet data

Comcast informed me that less than 2/3rd of the way through the month, I had used 1 TB of data and was over my limit last month. This surprised me as I didn’t think I use anywhere near that. I bought a new router with good bandwidth tracking to track it down.

Today alone, 1 of my Pis used over 1GB of data. I didn’t stream anything other than from my Windows Media Center (all local). How do I track down what is using all this data?

I have another Pi and haven’t had this problem. They both have the same install (I copied the install over).

I am running the OpenElec 6.0.3 on a Pi 2.

I see a setting to limit the bandwidth, but that isn’t really a good long term solution.