I use f3 (fight flash fraud) to test for counterfeit drives, but it would also be a good thrash test of any drive i.e. push it hard to see whether it is faulty. (However it looks as if that would complicated to use on Windows or Mac. It might actually be easier to do a Linux Live Boot in order to install and run f3, provided that you don’t have the same problem when you try to boot Linux from a flash drive. 
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Note also that these are destructive tests. So you either test a spare flash drive or you image it (where possible!) before testing.
