If neither of these two methods can detect it, then it means that the particles used in your USB flash drive are black flakes, which are miscellaneous brands
As long as you don’t buy all kinds of fancy USB flash drives nowadays, , don’t go to rubbish platforms, don’t be greedy for petty advantages, and buy brand-name products, there will definitely be no big problems. Big brands like SanDisk also have lifetime warranties. You don’t have to stick to a single brand. If you are looking for cost-effectiveness, you can look for DIY disks, and the details are clear.
This platform is convulsed every day, and I can’t even reply to comments.