I'm trying to publish an updated Python script GP service with an added parameter. This service uses about 10GB of data, which is already contained in a central data repository accessible to the server. I've tried to publish the updated service through ArcMap and with a Python script and I can't get it to not re-copy the data over to the server. I've tried unchecking the "allow data to be copied to the server" box on the ArcGIS server manager and setting copy_data_to_server =False in my sddraft definition in Python. It's still copying over the data. I just need the service itself, and I'll alter the Python script data paths once it's published.