Delete, delete

I got a notice from Apple that I am running low on space and need to buy more for saving things.  I do care about my past and my family but I am confident I have enough documents and pictures.  So, I spent about an hour or so deleting things.  While doing that I stumbled on a giant patch of photos of a QR code.  I imagine there is a setting somewhat that will avoid saving such photographs.  I guess some smart intelligence kicked in and kept showing me photos of that.  I doggedly deleted over and over, finding it a bit faster to use a pen with a soft rubber button on the end.  I guess it feels like a finger to the machine.