I bought a Trekstore external disk drive many months ago but never installed it. Now I want to but no longer have the users manual. It is a 400gb model. The serial number is 070215112. The only thing I'm not sure of is turning it off. My pc needs to boot up and power down. Is this the same for my external? And if so what is the power down process? My email addy is: bouchfam@speedpost.net. Thank you!