You can easily do mass export of data more efficiently in the form of an Excel sheet.
Konciv allows you to Export any table to Excel. You can do this from any "Item list" (both standard and custom lists you have created). To export to Excel navigate to an "Item list" and press the "Export"- button.
Navigate to the list of items page that you want to export as an Excel sheet.
Click on the Download icon in the footer.
Your data will be downloaded to your PC as an Excel sheet.