Alla, usually you have to pay for extra bandwith - well, at least I have if I exceed my maximum for the month. My provider has a FAQ and everything regarding the webhosting service is explained in detail. I am sure the webhost you have signed up will have a TOS and FAQ too. Wow, I just noticed 500MB for $35/year. I have 150 MB and pay about $12 per month. How many domains are included and how many pop3 email accounts do you get?

Every organisation rests upon a mountain of secrets ~ Julian Assange