I have an external LaCie Thunderbolt SSD drive that I usually don't have plugged in all the time. It used to be plugged in on my previous Mac as a boot drive, but now I use it mostly just to move things between computers. However, I left it plugged this time and even though I'm not using it at all, it is warm to the touch after being plugged in and idle for about an hour. I don't care it's warm as I don't hold it in my hand, but I don't want to break the little guy, so I plugged it off until I need to use it. But this brings me to the question - is it safe to just leave these external drives plugged in all the time? I know there are quite a few fans of the 'external drive as media storage' here, so I'd like to know if it's ok to just keep the thing plugged in. Even if it gets warm without actually using it. Thanks.