Teadmistebaas

You must enter to your hosting control panel cPanel.

Go to section "Files" -> "File Manager".

Here, you can see your entire user home dir. If you want upload content your site to the public webserver page, remember, you must enter in the public_html or www dir.
With the File Manager you can see the entire files and directory struscture, and manage all files, edit, delete, creation, download etc.
For upload files, you must click on the the top page the "Upload" icon. You can now select and upload your files.