I have an external drive that I've been using forever. It's USB, a seagate, 500gb, brown with an orange strip in the front that glows. That's about all I know about it. All of the sudden, when I plug it in, it isn't recognized by my computer. I've checked disk management as well, it's not there. Is this drive dying, or what? I'm not really concerned if it's just the enclosure, but idk... I had a lot of stuff on it...