Is having your ex’s nudes saved okay?

I’ve been dating a guy for a year now and recently came across photos and videos of his ex’s on his phone. He recently backed up all his photos and they jumbled up the order which caused a couple of nudes of his ex’s at the front of his camera role. I was sending myself photos from a holiday we recently went on and that’s when I saw them. When I saw them I was a bit shocked and didn’t say anything transferred the photos I wanted and then gave him back his phone. Is it too late to say something? If so what would I even say? I feel uncomfortable about all this but don’t want to come across as the psycho girlfriend. I’m insecure when it come to ex girlfriends and that’s because of my past relationships. He hasn’t given me a reason to feel insecure before this. I just don’t know what to do..
Is having your ex’s nudes saved okay?
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