How saving works: the roster, picks, log, and settings live inside this HTML file. Click Save after making moves โ the first save asks you to pick this file (choose it and approve); after that it saves in place with one click (Chrome/Edge on desktop). On other browsers, Save downloads an updated copy โ replace the old file with it.
Sharing with your co-owner: keep this file in a Google Drive folder synced by Drive for Desktop (or any shared synced folder). Each save syncs automatically. Take turns making moves โ if you both edit at once, the last save wins, so check the log's latest entries when you open it.
Import roster from a Google Sheet (optional, replaces the roster here โ for migration only):