So I have a internal hard drive that I'm trying to turn into an external hard drive. 

Its a Seagate hard drive:

http://www.impactcomputers.com/418264-001.html

I purchased a 2.5" sata external case but the ports don't match up with my hard drive so I can't plug it in. This is my first time trying this and I don't really know all the technical terms so I am pretty confused!

Please help!