Saving to SSD OS Drive or Data Drive

I have a new Auroroa R6. It has a 256GB SSD, designated "OS C":and a 1TB HD designated "Data D".

The SSD has a full windows directory including Programs, Programs X86, One Drive, Documents and so on . The Data drive is empty. Obviously the SSD is supposed to only have the OS not any data, but all the default folders are in that Drive and I am very quickly going to run out of space..

How do I get all my programs, data, photos, music and so on set up on the large HD?