I saved the photos to my desktop computer then open one photo (default Microsoft viewer) when the photo is open there is a menu at the top of the page click on the see more option (which is three dots ...)
The menu under the see more option includes resize image and I change size percentage from 100% to 50% then reduce the quality down until the size of the image is 250KB or under then resave that photo.
This seems to work and I am able to save 3 images per post.