Once you have your Author account, log in and go to Media on the left side of the screen, and then Add New. From there, you can upload your compressed (zip) campaign file.
Then, create a new Post and in a new block (new link) click the ‘Add file’ button, then ‘Media Library’. From there you can link to the file you uploaded.
Now with the rebranded face of 270sims, how do I create a new account?
Nevermind. Disregard the last comment.