[user5994461]

One thing to be aware of. To verify if flash drives work, you have to fill them fully with data and then verify the integrity of all the data.

The scam for many flash drives is to provide a working one that's only a fraction of the size (but it reports the full size).

It works fine as long as you don't use more than the real capacity, that may be a just few percents or as much as half.