Hello, for a couple of seconds I plugged in the wrong a/c adapter to my external hard drive. I unplugged immediately when I smelled plastic. I plugged in the right adapter and still smell plastic. I immediately unplugged. Is the hard drive ruined?
More aboutfree tech support fried external hard drive
At least the power circuitry in the enclosure! Possibly the drive itself, open it up and see what you find something melted!