Hidden photos automatically delete

[Android Central Question]

My new galaxy s8 deletes my hidden photos overnight while on the charger. Is it a setting? What can I change about it?

 

[B. Diddy]

Welcome to Android Central! Are these photos you took with the camera app, or are they photos you downloaded from somewhere on the web? If the latter, then see if you have a "phone cleaner" setting or app that might be automatically clearing out the Download directory on a regular basis.