Oh, so anyone in relationship should just delete everything? Is that something you are going to propose? She's still my friend and we cherish everything we had. Please. Don't think so creepy about other people.
It sounded like you wished you had a bunch of naked pictures of her. So yeah, creepy.
I'm still friends with various ex girlfriends too but I don't go around saying "I wish I had more photos of my ex from back when we were together" because it sounds like a mixture of creepy and unable to let go.
And how would she have felt about her creepy ex having kept a whole load of pictures of her?
That's really quite weird.
--edit-- seriously, read that last sentence of yours back. That sounds deeply creepy.