Ok Thank You, how would i go about doing this? like how would i add program files to my HDD?
It depends on the program, but most of the time when you install a program one of the screens during the process will be asking you where you want to install the program. So you just make sure to point it at the HDD rather than the SSD in that instance.
One notable exception would be Steam, which defaults to installing everything on the same drive the Steam client is installed on. You can reinstall Steam onto the HDD, and there is a beta client which will let you choose where to store the Steam game files.