How to import and export between two Squarespace 7 sites

The Trig team first started in website design with Squarespace 5 in 2011.  With the release of Squarespace 7, we've been promoting the platform to not only start-up and small company clients, but mid-sized companies have been able to get a flexible marketing tool as well.  Many small companies have built their site in another content management platform, Wordpress.  The limitation of Wordpress is that the source code is open to the public and hackers have multiple points of entry.  Squarespace, by comparison, has privately managed source code and servers, making it a much more secure platform.