Bests & Worsts Reviews from Amazon

I copied ~15GB of big files to SanDisk 32GB model from a ThinkPad X1 Carbon. I noticed that the speed quickly dropped down to less than 10 MB/s, so I was disappointed because my USB 3.0 drives are consistently fast. But as if the slow speed was not bad enough, I literally burned my fingers when I unplugged it. I did not receive a bad burn, but I can still feel the burn on the tips of my index finger 10 minutes later. I am an adult male. I am not extra sensitive to hot temperatures. This device is a danger to both humans and to USB ports. In their comments, SanDisk is lying about the max 95 F temp. I copied a 4GB file to the device, and measured the temp at 120 F - see attached pic. I assume it would go higher if I copied more data.