Meet ContactSheets, one of the popular plugin to save your Contact Form 7 forms entries within one single Google Spreadsheet. It can easily save your all the entries in single spreadsheets with great features.
We can also set freeze header within the Google Spreadsheet. User can easily change the headers name and custom ordering in ContactSheets settings page. There also have option for file fields to save all the files within plugin uploads folder and add link within the Google Spreadsheets row.