@Kevin_Z Was set to high which is it's default so i set it to middle. Now its wait and see.

@Kevin_Z The passport ultra is a unlikely cause since its rebooted without the drive.altough i would suggest adding a option for having the drive spin down after a set period of time to reduce power...

@vinodrajan I also have one that randomly reboots on its own. Its being used as an access point rather then a router with a static ip and a my passport ultra plugged into the usb. There shouldn't be...