Facebook post extraction

Two years ago I started a group to report to family and friends on a road trip that 7 of us guys took from Canada to Costa Rica to help deliver a 1979 motorhome. During the course of this trip due to the numerous photos I was taking, I felt it necessary to delete photos after reporting them to the group.
Now I want to make a digital slide show exhibit with these pictures, but I can’t seem to share the posts or pictures outside of Facebook, even though I’m the administrator.

Is there a way to pull out posts or pictures from my group?
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If the group is private you may not be able to share. You can download the photos and then do whatever you want with them.

Share them outside, as in on another site? Pull them, well, you have a history in facebook that you can find your posts, and go to each page and download the pictures, that is, if that is what you are trying to do. Or possibly, if you request a copy, facebook emails you a mini version faceook pages of your profile, which should hold all your pictures, then you save it to your computer, extract it, and can click on it and browse locally of all your stuff. I can’t remember how the pic are stored, but it they are put in a folder, then you can go there, after extracting, and just rummage thru them for the picture that you are looking for.