I have a Seagate 500GB external hard drive that has been put in a new casing after some wires in the original came loose. I only got it back two days ago.
So today I plugged it into my macbook and everything was fine, and then suddenly the warning/error window pops up saying that it's not been ejected safely. I hadn't touched the acutal hard drive or the wire or anything. I thought it might've overheated or something so I unplugged it, left it for a few minutes and then plugged it back in and nothing happened. The light on the actual hard drive's turning on but that's it, the laptop's not registering it. I've tried it on my mums windows laptop and it does the same. It lights up but no icon appears on the desktop.
I've also looked for it in disk utility and there's nothing there either.