Hello, I made an account here just for this problem. My friend gave me this 250 GB hard drive, I don't know what kind of drive. All I know is that the LEDs blink for 1 second and then goes off, I hear no hard drive movement and it doesn't show up in device manager. Once I plug it in to my PS3 it works with everything on it. I don't have anything important on the hard drive so I don't mind formatting it. Thank you.