The 4TB Backup Plus Fast drive has two drives set up in RAID 0. This provides maximum performance, but with two drives this may result in additional heat during heavy load. Extensive testing has been done on this drive under heavy load. Throughout the testing, the drive never exceeded 120 degrees Fahrenheit or 49 degrees Celsius. This is within normal operating temperature of 60 degrees Celsius. If there are any concerns regarding the health of the drive, then it is best to test the drive with SeaTools for Windows.