Really just terribly stupid
I lost my keys, I am not sure how. I have a USB drive on my key chain, just in case I have to move a presentation file/to be cool. I don’t think there is anything stored on it that would give any nice persion who might happen to find my keys any way of contacting me. If I never find my keys I will be forced to conclude that the main reason (aside from losing them in the first place) is that I was too dumb to put any sort of contact information on that drive.