Programs for diagnosing usb flash drives, who knows?

Question

USB

Dofiga working identical flash drives, some of them were not used, some were actively used. How would I know at least the number of entries / overwrites? And then understand that you can use it further without fear.

Answer 1

How would I know at least the number of entries / overwrites?

It's not an SSD and they don't have SMART.
The answer is: in general, no way.

Answer 2

Alternatively, you can check the sectors for reading / writing link

Answer 3

There is also h2testw.
shparg.narod.ru/index/0-34
But you won't know the number of overwrite records in any way.