What kind of hard drive is this and what do I need to make it external (details)?

http://i1120.photobucket.com/albums/l489/Aganusn/mail2.jpg
http://i1120.photobucket.com/albums/l489/Aganusn/mail.jpg

I’ve bought and returned two different devices: a case to make that hard drive external, and this other thing that simply attached to it and connected to the computer via USB. They were both too small. I was hoping someone on here may know what I need because no one at Best Buy seems to know.