There's no question that it's beginning to show signs of failure - the USB 3.0 interface board inside the enclosure, not the drive itself. I had this recently happen on mine after the 30 day warranty expired from the store I purchased it from. I could have very well contacted the manufacturer and RMAed it like you can, too, but I decided it was not that big of deal since I knew the HDD inside was still good. So I opened up the case, took the HDD out and put it in my media player knowing full well that it would void the warranty which I didn't mind. However, I would not recommend doing this for anyone else, especially if you wish to avail yourself of all options you actually paid for with this product.
I had that at the beginning, the drive was popping on and off however I am using a USB cable extension and it wasn't connected securely to the drive cable. Once firmly secured, no more issues and the drive is running 24/7 on a server.
Yes, I have. I received my drive yesterday. I installed the drivers onto my HTPC and plugged it in. I set WMC to record TV shows onto the drive. It seemed to work ok. I put my Windows 8 HTPC to sleep at night. I came back today and saw that none of my scheduled shows were recorded. WTF? So I discover that the drive isn't being detected. I tried replugging the cables, restarting the drive, etc. Nothing. As a last resort I rebooted. That did it; but that's not a very auspicious sign. Another instance of this, I'm returning this drive.
It did to start with, the slightest vibration made it disconnect, not doing so any more. I think it was the fact it was a new drive and a new usb3 card, got better the more it was unplugged and replugged which polished the connectors.
Mine did the same after very light usage and within the first 6 months. However, it was not the usb interface board as I opened the case and tested it hoping that I could retrieve my data. With special external hardware SATA to USB interface, and power supply, the drive still would not respond other than making a buzzing sound (1 per second) trying to start. Sounded like a stuck head on the platter. I lost all my data due to this hardware failure. Seagate would not attempt to recover the data without a $150 additional fee, but they did accept a hardware return with a recertified replacement.