There as a Marine... and our working conditions where our data equipment was located was not that of an open desert. We had brick buildings with glass windows etc etc to place our data equipment and work out of. Also it was something like an oasis area where there were trees... also the large burms (dirt mounds + large concrete barracades standing 20ft high) surrounding the camp blocked nearly all wind in the area.
I assure you... sand storms... or sand period, was not an issue when working with the thumb drives/usb sticks... not in any of the 3 camp sites I was at.