While this is techincally possible, any site created using a subfolder will also appear as part of your main site.
For instance, if you created a site under a subfolder named 'test' then your page would appear at www.whub##.webhostinghub.com/~userna5/public_html/test/index.html. This also would appear in your main site as: example.com/test/index.html.
Likelyt he best solution is to create a subdomain for your site. This will appear in the format of test.example.com
You can learn more about how to create a subdomain here:
How to create a subdomain
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