Hello techspot community, I'm new here and I apologize in advance if I've done something incorrectly. In short, any computer I access via LAN that is connected directly to my router uses up internet data. For instance, if I watch a movie stored on a computer connected directly to my router; though it is being streamed through my LAN, my net usage gets eaten up quickly from it. This also happens with software such as teamviewer and splashtop even when set to accept LAN exclusively. Whats odd is, even when I disconnect my modem from my router and watch a movie, my router still says data is being passed solely through the internet and a lot of it. So I'm almost certain the issue is with the router but not entirely sure what. Interesting enough, when I access a computer that is connected to my router by wireless from a wireless device, there isn't any issues consuming my internet when using the LAN. I find this to be a huge problem as on the first of this month I decided to watch some HD movies over my LAN and it used up over 100 gigabytes of data which I confirmed from my ISP I have to pay for that usage even though I wasn't actually using the internet. This problem is quite new, I'm not sure exactly when it started, but I haven't had this issue for the first 6 months I owned this router, it must have been something I changed in the router options but I haven't yet found what it could be. Addition info: ASUS RT-N66U wireless router ASUS router is bridged from a Hitron modem. Win 7 Ult OS What I've already tried: Monitored my internet traffic to conclude the problem. Contacted my ISP, everyone was confused and no one was able to help. Reformatted a single computer connected directly to my router so see if it was software related, didn't help. Went through router options intensely without success. Tried multiple computers directly connected to the router and issue persists with newly connected computers. Upgraded my modem to see if that was an issue, it wasn't. Updated router firmware to the latest, didn't help. Gone through the network sharing options from OS thoroughly. Any suggestions regarding this is much appreciated! Though already implied, I want to ensure the understanding that even file transfers from one computer to another on my own network is using my internet data for some odd reason.