of the universe there's going to be a great swirling cloud of mislaid data CDs and memory sticks. It's probably a few light years away from the swirling cloud of odd socks, spanners, Stanley knives, and spectacles.
Memory sticks are too small, and too easily misplaced to be a secure way of storing sensitive data, and I advise all my corporate clients to avoid them like the plague for such purposes.
I lost one on an aircraft once, and to my utter astonishment it was found and handed in by a Singapore cabin cleaner. I retrieved it eight weeks later, and lost it again about a month ago. It's in that great swirling cloud by now, but I don't care - it contained nothing of a sensitive nature.