Syncing allows you to access your Zotero library from any computer.
*Tip: Zotero provides you with 300 MB of free storage. You can purchase additional storage space on the Zotero website.
Sign-in to Zotero
Click on Preferences under the Edit menu:
Click Sync and enter your Zotero username and password, and click Set Up Syncing:
Click on the sync icon (green circular arrow) in the upper right-hand corner to sync your Zotero library: