With the free hosting there's no option to get that up start.
You start out with 0.5gb, and can get increases as needed incremental, but the account first need to be using 75% of the current allotment, be at least 7 days old (and for consecutive increases to be granted there needs to be some time in between requests) and in good standing with the Terms of Service.
Your account isn't even a full day old right now and doesn't appear to have any attempt to start building a website.
The only way to get started with a higher diskspace is by signing up, and paying, for our
premium hosting.