Click on the gear icon and select “Import”. Browse to the location of your file and save it into Zotero. This option works for the following bibliographic file formats: Zotero RDF, MODS (Metadata Object Description Schema), BibTeX, RIS, Refer/BibIX, and Unqualified Dublin Core RDF. You can use Zotero's import and export capabilities to transfer a set of references from one machine to another or from one reference management system to another. For instructions on how to make the switch from Endnote to Zotero, for example, please see Making the Switch to Zotero.

Please note: Import/export is not recommended for transferring entire Zotero libraries between systems, and, if you use Zotero's word processor plugins, links to items in existing word processor documents will be lost after an export/import.