You can import data from and export data (and formatting) to Microsoft Excel, both in individual spreadsheets and entire workbooks. You can import and export entire spreadsheet(s) with data and formatting to and from XML. Several versions of Excel are supported and several file types, including XLS, XLSX, CSV, and TXT.
For more details about what happens during importing or exporting, refer to the Import and Export Reference.
For more information about saving and loading files, refer to Saving Data to a File and Opening Existing Files.