WD External Harddrive 2TB

i have a wd 2tb external harddrive but i cant find it on my computer it works fine but i cant find it anywhere what can i do to fix this?

Hi, check if you can find it on the disk management window. 

http://wdc.custhelp.com/app/answers/detail/a_id/1284/session/L3RpbWUvMTM1NzIyMzEwNi9zaWQvbWlBTmxuZmw%3D