Site Ground staging is different from WP Engine. For WP Engine, the staging environment is in your account.
For Site Ground, staging is cPanel -> WordPress Tools -> Staging.
Here are the steps:
1. Login to SiteGround.
2. Click My Accounts.
3. Click red Go to cPanel.
4. Search for Staging. Click Staging under WordPress Tools.
5. Click green Create Staging Copy.
If you can’t access your staging site:
The staging copy was created with the URL: http://staging1.domain.com/ and since an A record was not created to point to it, it is virtually unreachable to the world.
But since you and I know the IP where it resides, we can ‘tell’ our local machines where to find it.
That can be achieved by adding the following in your hosts file:
(replace xxx with IP; replace domain.com with the domain that your broken staging site points to)
You can find out how to locate your hosts file in this article: