Ultra Fit USB 3.0: Excessive Heat

I recently bought one SanDisk Ultra 128 GB dual OTG Flash drive, with a C type connector on one side & a standard USB connector on the other side. It’s capable of USB 3.0 speed.

When connected to my Samsung S8 mobile using its type C connector, the flash drive was getting very hot within a short time. I use it to play music (wav files) & it started to heat up even before the first song ends. By 10 minutes, it used to become so hot that I could not touch it without being burnt.

So, I returned it & got a new one but again the same problem.

This time, I connected to the mobile using the standard USB connector on the flash drive & a type C adapter that came with the Samsung S8. Lo & behold, there was absolutely no heating problem whatsoever even after playing for hours.

Does this mean that the problem is with the C connector?

Users of this flash drive, please give me your feedback.