You can save photos from your photo album to image files.

Open the images screen in the left side panel inside PrintCentral. Select one or more photos and the choose "Save as file" from the action menu. (circle with 3 dots button)

Then you can choose where to save the file. You can save the image file to the local files screen or to a cloud server.
You can also save an image file to your Mac/PC. (View)