You can now set up Zotero syncing to sync your data across multiple computers, access your library online, or collaborate in group libraries. Follow these three steps to get started.
Open the Zotero application from your dock, launcher, or filesystem.
Select “Preferences…” from the Zotero menu (Mac) or the Edit menu (Windows/Linux), and then select the Sync tab.
Enter your username and password into the Sync preferences and click “Set Up Syncing”. Zotero will now automatically sync your data as you make changes.