Are you saving the pictures to your phone's gallery or sd card and backing them upto Samsung Cloud or One Drive ?
One other option I use is to auto send any photo I take to my Dropbox Vault as a back up.
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "