In addition, I measured the current drawn by the Ultra Fit USB 3.0, it is more than 4x higher than the current drawn by the Cruzer Fit USB 2.0.
Ultra Fit USB 3.0 = 896 mA
Cruzer Fit USB 2.0 = 200 mA
Could this be the reason of the overheat, considering the physical size is not much larger while the power has increased 4 times.
