Windows help - SSD full, HDD empty

Hi, I'm pretty much ignorant when it comes to computers so bear with me. I just got a desktop with a 128gb SSD and 1TB HDD. I just noticed today that the SSD is nearly full(5gb left) and didn't know I had to partition/format the HDD...so I went ahead and did that.

Now my question is, how do I move everything except Windows 10(and whatever else I should keep on the SSD) to the 1TB HDD?