I am trying out the HUB in PP and I havent figured out how to get one of my files uploaded to it.

I do not use Fusion 360, I use sprutcam and I would like to upload one of my files to the hub to check out what it does and how it works etc., I cant figure out how to upload a file to it from my windows computer that I use for cad/cam.

any help or insight would be appreciated!
thanks