is it an ext or int hard drive. if it a new int drive and you have another drive with os on it. use windows disk management to format it. if it an ext drive it should show up when plugged in and turned on.
is it an ext or int hard drive. if it a new int drive and you have another drive with os on it. use windows disk management to format it. if it an ext drive it should show up when plugged in and turned on.