Moving from one offline computer to another off line computer

Assuming that you now need to move the site to a remote server, see Moving_WordPress.

Thanks Esmi

Hmm.. I wonder if they’ll let me keep giving this anwer, or think I’m working for the company. But, I care about what works. This makes it 1,000 times easier for everyone: https://pluginbuddy.com/purchase/backupbuddy/

You can also try the Duplicator a free plugin that packs up the local or online site into a package and makes it easy to either download as a backup, or upload to a new site.
For uploading one would then also need to create a new database through your hosting provider. (Cpanel etc.) Get the database info and put it into the Duplicator. The plugin is easy to use.

https://www.ads-software.com/extend/plugins/duplicator/