The credit doesn't just go by the number of returns - it also considers the total value of the returns and the value of purchase to value of returns ratio.
The commenter above was suggesting that returning a USB drive could hurt your social credit and I am saying that is overblown.
In my personal experience a large volume of returns won't even get you banned. A USB drive is also low value so assuming you are correct then again the fear of returning a USB drive should be zero.
