Junction points are transparent to programs. If you check the Properties of the original folder (in your case ‘C:\ProgramData\Steinberg\Content’) it will appear that its files or folders remain in the original location, but they aren’t, as in fact they are in the Destination target folder (in your case in another drive). The contents of a junction use almost no disk space as they simply point to the target (your second drive) but as I said before in a complete transparent way.