Thanks everyone for all the information. Iíll have to read through all the links a few times.
Not a gamer but have lots of photos & some videos on the HDD & don't know if it could be shrunk down to fit on a smaller SSD. I was thinking about a 128GB or more likely a 256GB SSD.
I think creating a new partition on the HDD for the data & then just cloning the "C:" partition with the OS & programs might have to be done. But then I'm not copying the data from the SSD to the HDD as mentioned, so does that mean the programs may never find the data?