I have a Seagate 640gb hard drive. When I was cleaning, I accidentally bumped to the table and my hard drive fell. I tested it to my laptop to see if something is wrong and it goes undetected. I tried finding solutions in the internet and tried some but didn't work. I tried opening it in Computer>Manage>Disk Management but I still didn't see my hard drive. I remember when everything was still ok, that the light from my hard drive was blinking on and off, but now, it's just stable. All my pictures, portfolios, thesis paper and other school works are in there. Please help