Pics in hubs phone

So I found a Dropbox in my husbands phone full of pics of topless women..

I’m kinda having a hard time with it because it just makes me feel like I’m not enough for him. What am I supposed to do? If I bring it up, I have to explain why I was looking through his phone (although it was up on his recently used apps is the only way I found it).

What would you ladies do? I’m just hurt and sad right now.