I have the same problem. Mine is even worse because I have my backup files on it. It worked for sometime and stopped. It started flashing once you connect the usb when supposed to wait until activity happens. It has now since just wait but still cannot be recognized by OS win xp. It does not show under Explorer nor under computer management. Could someone please urgently assist since we are an NGO and without accessing those files, the organisation is dead
What happened to its autorun...
HELP! I've recently bought Samsung HX-DU020EC, and I'm having the same problem. When I plugged it in for the first time it worked good, but the next day it couldn't be recognized, so I tried changig the USB port on my laptop over and over it just didn't work. Then I shut down the comuter, turned it on while the HDD was plugged in, the result was the same. Then I tried device management and the drive wasn't recognized even there. So I tried most of the stuff written in the manual and finally it was recognized. Then I formated it thinking that the problem would be solved. But the problem is still here and now it doesn't matter how many times I plug in and plug out the usb, the power cord it can't be recognized.
I found the solution in my Windows 8.1 computer as follows:
1. Go to desktop mode.
2. Open File Explorer.
3. Select "this PC".
4. Open the tab "Computer" (next to "file").
5. Click "Manage" and Computer Management will open.
6. Select "Services and Applications".
7. Double click on "Services" and a list of services will be shown.
8. Search for "Device Install Service". Right click and select "start".
9. Search for "Device Setup Maanger". Right click and select "start".
10. My computer suddenly found my external hard drive.
I found it the problem to be an issue of voltage drop over the usb cable. I just swapped a cable I had off my ps3 controller and it works a treat now. I also changed one of the usb ports I was using as well (this occasionally worked but only on a full unplug and restart of everything). So try get a good cable and try change to one of the "main usb" ports (i think they are also known as the primary usb ports. If you have 6 like I do, the two top ones are my primary ones apparently and they are delegated priority and power over the others says my mobo manual.
This is likely a design flaw of these drives. Just keep unplugging and reseating it until it's seen by the OS. I've had mine do this since purchasing it a year ago. Often it's not seen the first time around. I suspect it doesn't spin up fast enough and the OS doesn't always recognise it at first. Unplug/reseat and you should come right before you do it for the 10th time lol.