I don't know if you have the same model I do, but 1.) I HAD to hook up 5V power AND the USB because if you check the power requirements on the drive it's up to 2 amps and you're usb hub typically only supplies that, so if you have other devices plugged in...good luck getting enough power. 2.) the eject button never worked. Mine even has the apple logo. These drives I believe are surplus from Mac Mini's and MM's don't have eject buttons on them if I recal. The hardware eject buton has been disabled and glued in so it could sit up flush in the mac. You have to use a software eject in either My Computer (right click the drive), or RoadRunner's built in eject, or if you PM me I can send you a standalone eject.exe that came w/ my drive.