Site redirection and subfolder

Hello,

I was searching the Internet, but couldn’t really find a solution to my problem. I want people (except my IP address) to be redirected to a FB page. So when somebody visits http://www.mysite.com, I want them to be redirected to the FB page (except my IP address). I have WP installed on that address.
But I also want to copy the content from the root (www.mysite.com) to a subfolder, e.g. test. So that I can access the site at the address http://www.mysite.com/test and be able to make changes with functioning links.

So far I managed to achieve the redirection part. Everybody is being redirected from http://www.mysite.com to the FB page except my IP address.

Summary: Is it possible to redirect people from the site http://www.mysite.com to a FB page, while being able to copy all the content from the page to a subfolder /test which can be accessed and edited by me (without adding IP exception) at http://www.mysite.com/test ? (without the need of adding IP exception for http://www.mysite.com/test)

Hopefully my babbling is understandable 😀

Thanks for any advice
Dave