It turns out that dropping a dark-gray USB flash drive on a dark carpet under a table in a dimly lit room doesn’t produce a net increase in happiness. The next time that happens, we’ll be able to find the thing:
Each side has a snippet of retroreflective orange tape; the tenth drive lives with the Token Windows Laptop. Done!
In related news, the Dremel Wrench went missing despite its high-viz tape. I vaguely recalled tucking it into a tool bag for a remote house-call repair jog, but a week later it turned up in the breast pocket of my demin jacket. Maybe it needs a bulky lanyard?