To make things the easiest,
When you save your photos, put them where they're very easy to find..
Either on your desktop, or in a specific folder on your desktop [like a folder named AGN PICS]
When you're 'here', and ready to upload your photos, you'll click on that little photo button,
and be prompted to find / upload your pic.. Navigate to where it is [ex: desktop or folder] and double click it..
Or, select the photo, then hit okay.. The photo will begin to upload, and time depends on file size..
Your image will appear, and you'll be good to go.
You can do 1 image at a time.
Hope this helps!
Sam -