Here's an unusual one - an M.2 SSD to USB adapter.
Most, if not all, laptops come with SSD's nowadays, and they're usually pretty easy to take out from a laptop. Gather some old, broken laptops, and take out their SSD's. They're so much faster than USB flash drives, I prefer to use SSD's where possible. Plus, it helps with e-waste
This is it for me. I don't go through many laptops on my own, but ask around your family? You can get quite a stack of e-waste pretty quickly. Especially if you've already been labeled the "tech guy" of the family
Could even make this a little simpler - if somehow you're not using an SSD at least as the primary boot, please god change that immediately. $50 can easily get you 512gb, often even a TB.