Attach a file to a web page

I am starting the landing page and I am having trouble. I understand the pictures, you can use the web address to insert them on the page, but if I have a picture I created on my hard drive. How do I attach it to the file in freecodecamp.

If you want to upload the image to codepen I think you have to be a pro, but just share your photos in a cloud storage service and make the images available to everyone, copy the image link and paste it in your code.