There are lots of ways to migrate a WordPress site. Lots of plugins can do it. You can do it over simple (S)FTP. But the quickest way I know of is via rsync and WP-CLI. But that does come with an important proviso: you need to have access to a shell (via a simple local terminal or SSH) to both ends of the migration. And that’s often harder to do than the plugin or SFTP route. But if you’ve got that, this way is a great deal faster.
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