I know this isn't what you asked, but you sure you need a 1 TB folder? Having 1TB on C drive should cover everything. You could make a new folder on the other disk and call it whatever you want, have the index index it, and be able to quickly type the folder's name or its contents in the start menu search, and have it instantly appear, so you don't HAVE to make a HD into a single folder on C drive.
Having a 1TB folder drive on a 1TB HD seems like a giant waste