Sorry for the lag in response time..Been busy at work
As far as I know there is no stress test for a USB memory stick.. Depending how it is connected (USB, USB 2.0 etc) is how much the speed will be..
If you connect the Memory stick and boot into windows you can format it
Right Click my Computer
....The next pop up windows click on Disk management
.. Scroll down until you find you USB stick and click format and direct it to format it in NTFS..
I have done this on mine. But yours may differ depending on what kind it is...
You may be able to use something like RST
and have it directed to your USB memory.. But not 100% sure. Again it is all in how it is connected that gives it...it's speed..