@S D my understanding is that N400 is just for yourself and they don’t ask for documents like in the I751. All I could see was the marriage certificate and that’s it. Maybe you can bring the documents and photos with you if the agent ever asks for additional evidences.

Thanks for sharing. I did it on the App "Inmigra USA" the community of Immigrants in the United States. inmigrausa.com There are immigration lawyers and free collaborators. Stay up to date on news of interest to the Latino community. Search Inmigrate USA. I chose the Florida community, it looks like they are starting now, so I recommend you choose Florida. Busca inmigra USA el app del inmigrante, de verdad es muy buena tambien. Thanks!!!

@S D I just filed on December, I didnt send any because it didn't indicate that i do. I had sent pictures with my i751 though.

I files online. I submitted many documents scanned. over 30 maybe showing standing marriage. but no pictures. everything you submit online be prepared to bring originals with you. good luck