I think if you go to file browser on the right, open Studio One, there is a Uploads>Presonus Sphere location, drag and drop your folder/project/file to this location. Seems to have worked, but have yet to upload the whole folder yet. I made a copy of the folder to share as it seems to want to move the whole folder off the system to the Sphere.
Technically it is sitting in a local folder, haven't figures out how to push it to the Sphere - Backup and Restore just keeps backing up system settings