<human>: Can you condense the text into a few key points?

I am 18F and he is 17M, been together 6 months. I've known this secret file folder app has been on his phone for some time, and he tells me the contents of it are nudes that I have sent him and a couple screenshots he's taken from porn, which I'm fine with. One day I asked to see the pictures in the folder, and he refused. He said it made him uncomfortable viewing those pictures with me there. I said it shouldn't because I sent them to him, and that it makes me feel like he's hiding something else from me, and that him hiding it from me questions my trust in him. He still refused to let me see the pictures and said he wasn't comfortable with it.

Should I just drop the issue, or is there something to be worried about here? I feel like he could have nudes from other girls in there, because to me it seems dumb he would be uncomfortable with me looking at pictures I had taken myself.
<bot>: see title. And his reasoning is it makes him uncomfortable if I viewed the pictures, even though he claims that there is only the nudes I sent to him and a couple screenshots he took while watching porn.