That would be very difficult to accomplish in Adobe Analytics without the data from the existing hosting provider. Adobe Analytics does not have access to everything going in and out of your site, especially if non website elements are factored into the equation (such as downloads or PDF's). Most hosting companies provide this information as a free service by default. Here's what my usage looks like with godaddy on my personal site:
[img]Bandwidth Usage.png[/img]
I only get a couple dozen page views a day, so my usage is very minimal.