Treat it like any other component overheating problem. Is there good airflow over the drive, or is it nuzzled at the bottom of your case between two hard drives and a rats nest of cables? Is it mounted on the motherboard back plate?
More info will let us help you more. What’s the temperature of the drive during these large file transfers? What’s the max temp before it powers off and is no longer detected?
Treat it like any other component overheating problem. Is there good airflow over the drive, or is it nuzzled at the bottom of your case between two hard drives and a rats nest of cables? Is it mounted on the motherboard back plate?
More info will let us help you more. What’s the temperature of the drive during these large file transfers? What’s the max temp before it powers off and is no longer detected?