In order to upload files to your web host web server, you can use FTP which stand for "File Transfer Protocol".
Note that on the transferring files to the web server does not necessarily mean that it will be publicly available. Depending on the configuration of the web server, if you put files within specified folders (typically "public_html", "www", or "wwwroot"), then it will be immediately publicly available. If you put files in certain other folders or if the FTP login is setup to do so, the files can be deposited to the web server without it being publicly available.
There are software known as "FTP clients" that will connect to your web host so that you can move files from local disk to web server and vice versa. Here are some FTP clients that you can try ...
You can download this free open-source FTP client from FileZilla-Project.org and click "Download FileZilla Client".
Here are some tutorials on its use...
Quick Connect using FileZilla
FileZilla Documentation
Using FileZilla Site Manager
FileZilla tutorial
If you want to transfer the files over a secured channel using "https", you can use SFTP (Secured FTP) client like WinSCP
Tutorials on WinSCP...
http://winscp.net/eng/docs/start
Window Explorer can also be used as an FTP client.
https://learnwebdesignonline.com/misc-tutorials/explorer-ftp-client.htm
