When you export the data from Neartail Reports to Google Sheets, the first column with the unique id will be locked. You will not be able to delete data rows, but you can apply filters on the other columns as required. If you have collected a large number of responses, then you can make a copy of the form and use it to collect responses going forward. When you export the data from this form to Google Sheets, only the new responses will be synced.