There are many reasons why you may want to move a WordPress Multisite out of a Multisite Network: the site might be too large, it needs its own IP address, the site owner wants to take full control, or the server is no longer able to efficiently host the Multisite network. Whatever your reasons might be, this article will guide you through the process.
Use an FTP client to download all files and folders and backup your database using phpMyAdmin. If something goes wrong, your files and folders will be safe and you will be able to recover everything.
There are four elements that you need to migrate from your Multisite network: the database tables, uploads folder, theme files and plugin files.
After this, you need to locate your Website ID. Each site in the network is defined by its own unique ID. This identifies its folder in wp-content/uploads/sites or, if your WordPress version is older than 3.5, it will be in folder wp-content/blogs.dir.
How do you find a network ID? Check the URL when you’re in the wp-admin dashboard of that site: