To create a backup copy of your data from Magpi, use the Export command on the Data tab:
- open the form containing the data
- click on the Data tab
- select the records you wish to export (to select and export ALL records for the form, click the Select All checkbox at the top-left of the data list as in image below)
- click the Export link on the top-right
You will be able to choose to export in a variety of formats, including text and Excel.