I guess most instructables start by a personal problem or challenge one needs to solve .
I got the new cheap Verbatim external USB HD 1TB for less then 90$ but it was so cheap Verbatim decided to leave out the fan so I had to improvise and add an external fan to keep the temperature down (it reached > 55C without the fan!
Now is Sumner time and the heat is UP - 38 C in the shade - we really got to cool it down.
Step 1: The internal power socket
Open the cage (warranty void) and locate the internal power socket.