This is going to sound silly but did you format the drive, even though your system apparently see's the drive and appears to try and write to it. Also you used the language expand ? the Local disk. They are 2 different drives, the one with operating system on it is C drive. If there are no additional partitions on it (orig C) the new drive should be D drive. While it possible to change drive letters the new drive will never be an expansion of / or recognized as the C drive as currently configured.
ok the default setup would be C:\ (your original drive) and D:\ (your new drive) E:\ (cd\dvd drive)
have set things up any other way? is the new drive formatted? can you copy files to the new drive? what are you trying to install?
I have my CD/DVD drive as D:\
and the new Drive as E:\
and yes it is formatted
I have Steam its installed already on the C:\ drive and I'm trying to install a new game, But it will not let me intall because the Program wants to install on C:\ and there is no way to change the Install path