Question about WD My Book Duo

Hello, is there any empirical data on how the device behaves with regard to temperature when either a lot of data is transferred externally or a rebuild is carried out? Unfortunately, I had negative experiences a few years ago (with another device) when rebuilding large amounts of data. At that time, the other hard disk died of heat during the rebuild and the data was gone. That was the end of the point of RAID. Thank you!