<human>: Could you distill the essence of the text into 1-3 sentences?

Backstory: I've been with my girlfriend for about 1 1/2 years now and everything for the most part is amazing. We've recently moved in together for the last few months and while she was in class I was using her old laptop due to mine being broke, while I  uploading a video of a party we went to over the weekend I noticed a thumbnail in her videos of her naked, after clicking on it I realized it was some type of sex tape she made with an ex. Immediate reactions are of course wtf, awkward, some anger. To make it worse I know the guy in the video, I knew they use to be together but never enough for them to make a video so that also surprised me. Its not the fact that she made the tape that upsets me, I myself have filmed a few experiences from my past but ultimately deleted them, but the fact that she has them.

I texted her and told her what I found and why the hell she still has it, she seemed noticeably upset claiming I was snooping through her shit and said we will talk after school. So now I'm sitting just wondering as to how I should take this. I want her to delete them of course and I don't have the right to force it. A big problem is just the fact that we've been together for so long and she has never hinted at the idea of a video but she made this with this d-bag that she was with for a couple months.

How should I respond to this issue? What if she says she doesn't want to delete them for whatever reason? Have any of you guys kept your past videos of exes, and if so what were some of the reasons you kept them? Do I have a right to even ask her to delete them?
<bot>: found a sex tape of my gf and her d-bag ex and wondering as to how I should take this.