External case removal, Seagate ST3160026A-RK External drive

Try here: http://www.seagate.com/external-hard-drives/desktop-hard-drives/expansion-hard-drive/

Here's one case. They're not terribly scarce, but not found just everywhere, either.

http://www.amazon.com/Aluminum-External-Drive-Enclosure-Silver/dp/B000F3WB0Y

Attaching it to another PC will just move the problem to the other PC. USB drives frequently have the problem you are seeing.

You can have your partition and data restored remotely by this guy. http://FreeDataRecovery.us

Remove those screws and pull it up.

Go to seagate web site and get software to reformat the drive.

Have you got the original power adapter?
If so the voltage details are printed on the label on the bottom of the adapter.
If the external USB Seagate hard drive houses a 31/2" drive then it requires an power adapter that provides +12 volts and +5 volts both supplying approx 2000mA of current.
If the Seagate uses a 21/2" (laptop) hard drive then it only requires +5 volts power adapter.
The only problem is the power connector to the external drive, make sure it suits the external hard drive unit and the power pins are correctly wired for the Seagate. If the polarity of the plug is incorrect lt wired (ie reverse polarity) then it could damage the USB hard drive and adapter case.

http://www.seagate.com/ww/v/index.jsp?locale=en-US&name=hard-drive-basics-dn&vgnextoid=2df42bb581b51210VgnVCM1000001a48090aRCRD
This is the seagate home you can check here for accessories or go to www.megawatts.com they generally have all kinds of parts laying around the shop.

You should be able to pop open the enclosure to retrieve the hard drive. You may need to take out a few screws.

Once you've done that, you can purchase another external USB enclosure to replace the broken one.

if your system some virus hope it is not read......better you try any other some card reader or pen driver if it read you try other OS ....

Ebay or seagate.com may be a solution.
I've used those Seagate portables and 2 have caused problems.
Or disassemble the unit, remove the drive and buy a portable case or USB adapter.