To conduct this step, you already need to have FileZilla software available on your computer and be connected using your host identification key. You can download it from the Internet for free : https://filezilla-project.org.
Folders and files present on your computer are listed on the left-hand side.
Folders and files present on your host are listed on the right-hand side.
Right-click on the right-hand side to create a folder.
The 3 snapshots here shows you how I created a folder on the server called programmer-pro.
Right-click to display the menu.
If you have a Mac mouse, you need to press the Ctrl key on your keyboard and click on the mouse.
Enter the folder name.
Here is the result with the new folder available.
Move the files from your computer to your host
Sélect the WP files to transfer on the left-hand side to your host on the right-hand side.
On Mac, the downloaded files are in /Users/<your name>/Downloads/wordpress.
Here you see the work in process. It may takes you 15/30 minutes depending on your Internet connexion.
Here is the final results in FileZilla. All files are available on the server of your host.