What do you mean by filestorage? My site hosts photos of users to tell stories about their Sims (The Sims) lives.Then you can ask for having your account upgraded to unmetered and if you meet the following you can have your account bumped to the unmetered diskspace:
1. Account is more then 7 days old (we look at the cPanel account only for age)
2. Already use half the initial space, for legitimate reasons, in other word the space used up is used for the site on your account, and not used as filestorage for instance.
3. There's a working website.