This almost OCD fixation with USB drive performance is funny. Perhaps I'm missing something, and our routers with scripts really do produce enormous workloads on our USB sticks. My simple experience over 30 years of using PCs is that I've had only 1 USB stick outright fail on me. All the while, I've transferred literally gigabytes of data between USB sticks and computers without any noticeable issue.
Having said that, a recent upgraded SanDisk stick did allow me to use uiDivStats without overloading my router's CPU, a script that was not working for me until I used the new USB drive. Perhaps these scripts do pose unnatural stresses to our USB drives?
Anton