Ultra Fit USB 3.0: Excessive Heat

I bought the SanDisk USB OTG 64GB thumbdrive, it feels hot at the USB connector, but not as hot as Verbatim 64GB Thumbdrive,

The Verbatim branded thumbdrive get really hot(whole body is aluminium) even if plugged into smartphone after prolonged use.

I guess it’s pretty normal for small thumbdrive gets hot, because of smaller heat dissipating area.