I found nudes and porn on his phone

I looked through my bf’s phone while he was sleeping and I found a girls nudes from before we met each other. He had them in is hidden folder. We’ve made videos before and he didn’t even have them saved. I also found porn sites open and onlyfans open and I get porn is one thing but it really bothers me that he pays for other peoples videos/pictures. I’m upset about it and I think it’s disrespectful and hurtful but I’m not sure how to bring it up, I don’t want him to be upset over me looking through his phone.