Create a connection to import a sheet. Sheetgo will create a new sheet that is linked to your connection. This sheet is underlined in green and locked to prevent editing. Whenever the connection is updated, the linked sheet is refreshed and any data you add to this sheet is deleted. To add your own information, create a new sheet and use the =ARRAYFORMULA formula on this sheet to reference your data on the imported sheet. Add your own information in the columns to the left or right of the =ARRAYFORMULA.
If you need more information about ARRAYFORMULA formula, click on the following link https://www.sheetgo.com/arrayformula-google-sheets/