This article refers only to images, photos and videos to be used in website pages directly.
It is not for photos to be added to the gallery. For those, refer to [page to be created]
Go to the Media Library page, which shows a list of the current media files, then click the Add New button at the top of the page.
Alternately, go to the Upload New Media page directly.
From there, follow the on screen instructions to upload your file(s).