That's the right place to put the file

I'm not too sure about your sudden bandwidth use, maybe someone else here would have more ideas??

Do you have a wireless network & if so, is it secure (ie do you have a WAP or WEP key set within your router configuration, so that other people can't connect to your wireless network unless they have the password)??

What I'm getting at is - is there a chance that someone (a neighbour maybe) might be able to connect to your network & use your bandwidth??