insanelymacdonald posted a topic in Hardware Components and DriversCPU | Intel core i7 6700 3.4Ghz Mobo | Gigabyte H170-D3hp Ram | Corsair Vengeance 16GB (2x8GB) 2133Mhz GPU | Galax GTX970 4GB SSD | Samsung 850 Evo 500GB PSU | Thermaltake 600w OS | 10.11.6 I initially thought this issue was a blown port and while it still could be hardware I've noticed something very odd. Two days ago I was using a USB 3.0 portable drive doing some colour grading in Da Vinci resolve. Quite suddenly, the mouse stopped working and then a couple of seconds later the system reset itself. I have no idea what happened but when the system rebooted a message popped up and for a tense few seconds I was worried the drive was ruined. The message said something like 'drive connected to mac but does not have power' or something along those lines but specifically indicating that I should plug the device in to a port that has power. This was the same port the drive was plugged in to when the reset happened and so I unplugged it and moved it to the port above and it worked. I was curious about the issue today and didn't have any critical work to do so I had a test with another bus powered drive that also previously worked fine. This one also had not encountered any dodginess like the sudden system reset either. I plugged it in to the port that I knew had caused issue and received the same message. I plugged it in to the port immediately adjacent and also received the same message. The thing is the drive is spinning so it *is* receiving power and the fact that it's giving me that message suggested to me that is registering on at least some level with OSx. Anyone know what I should do?