Zotero Research Management Software

Synching your Zotero is highly recommended! It will help back up your library and will allow you to use the same Zotero library across multiple computers and use group libraries with other Zotero users. Zotero can store your library and annotations on the cloud and use that to update other devices.

First, set up a (free, of course) Zotero.org user account. Then:

• Open Zotero preferences (in the Zotero app click Edit then Preferences on a PC and click Zotero then Preferences on Mac) and select the Sync tab. 
• Enter your Zotero user name and password. 
• Check the "sync automatically" box.
• Check both boxes under File Syncing and choose Zotero storage for My Library. This will sync your PDF attachments as well as citations (more info).
• Click the circular arrow button at the top right corner of the Zotero application window.
• Zotero will upload your library to the server.

Repeat this configuration on each of your devices. Any updates you make on one of your computers will be reflected on the others.

For more details and help troubleshooting sync problems, check the Zotero site.