HELP! MY PHOTOS ARE DISAPEARING FROM MY OLDER POSTS!

I was scrolling down my posts and to my horror, I saw quite a lot of photos have disappeared
from the older posts ( from the older media system )

After I have spent grueling days of sometimes, 15 hours work, I don’t have the energy to put another load
of hours to insert them again.

Does anyone have a secret wand to solve this problem?