In this guide, we show how to manually move an existing WordPress site to a different domain name.
Step 1 – Verify that your current site is working
Step 2 – Download the files of your website
Step 3 – Export your database
Step 4 – Upload files to your new domain
Step 5 – Import your database
Step 6 – Go to wp_options
Step 7 – Update siteurl and home
Step 8 – Update connection details in wp-config
Step 9 – Check your site on your new domain
Step 10 – Fix permalinks (Optional)
Step 11 – Fix broken images (Optional)
Step 12 – Check your site again (Optional)
https://help.one.com/hc/en-us/articles/115005585969-Move-your-WordPress-site-to-another-domain