Seagate st3320820u2-rk drivers

Rather doing a driver hunt which can take hours

http://download.cnet.com/slimdrivers-free/3000-18513_4-75279940.html

it might take some time being a freeware driver solution

note: it will find all of your outdated drivers

this is a free driver solutions
they will automatically search for and find the correct driver

also at cnet
http://download.cnet.com/2000-20_4.html
on the home page you should see a search tab just type in what you are looking for
IE: motherboard name sound drivers
you might have to try a few times to get it right

http://download.cnet.com/drivermax/3000-18513_4-10572602.html

Windows 2000/XP/Vista/7/8 free driver program

http://download.cnet.com/drivers-for-free/3000-18512_4-75548155.html

Windows XP/2003/Vista/Server 2008/7/8 free drivers

http://www.downloadcollection.com/device_doctor.htm

Device Doctor is a freeware Windows application that scans your computer hardware and checks to see if there are new driver updates available for your devices. It also locates drivers for Unidentified Devices in the Windows Device Manager. This tool was designed to be very simple and easy to use

http://www.innovative-sol.com/drivermax/
free program, paid update available

hope this helps