I have an external SSD HD (Kingston HD with an Orico USB3 enclosure) that seems to fall asleep after 15 minutes of being idle.
I've checked all my power settings for USB and for Hard drives to never fall asleep, but still encounter the problem. Only solution currently is to unplug the cable and plug it back in.
I've come across the KeepAliveHD app, but was wondering if there was a better alternative?