My book studio not working! help me!

Help!!! 

this is my first external hard drive, and i exit all the installations, by accident…

now it won’t work, i can’t even open it. and it doesn’t appear on the screen…

i don’t know what to do…

help me!!! T.T

Relax… you may want to explain a bit about your system and so on. Then, someone with similar experience may be able to help. But, I think the problem lies in the fact that Studio is pre-formatted for Mac, therefore you can’t see, or even detect the hard drive, because it’s not Windows-formatted.