I just bought a new 2TB Seagate Expansion USB drive. It seems to work fine, has no CHKDSK errors and passes the SeaTools tests.

However, when the drive is connected to my PC, it prevents the PC waking from sleep. When I remove the drive using Safely Remove or unplugging it, the PC will wake. What's the problem here - e.g. is there a particular driver I need to use?