[Ron61]

You can use the Attachment Feature as Alfa02 said or make an Album and upload them to that and then link them to your posts. Many people, me included also use the free hosting sites that are available and that way if a site crashes the pictures aren't lost. Just find a site such as Imgur, upload your photos to it and then link them from there and they will appear in the post in full size and not the thumbnails.

Ron