yes mario is right. but for api data taking almost lower space

yes. each web you create have 1000GB space... uploading file take space. adding forum take space. adding post take space. adding api data take space. adding page take space. adding code take space. storing login session take space (xml for expert). but user joining your site doesn't take space wapka already have about 999999999999TB to store those data that's why wapka don't allow you to stress your self deleting account.