If you have Excel 2002 or newer this path and filename is available under
View>Header and Footer.
Sometimes in the built-ins but if not, under Custom you have Icons to click on
to customize the footer.
If an older version of Excel you will need VBA code similar to this.
Sub PathInFooter()
ActiveSheet.PageSetup.RightFooter = ActiveWorkbook.FullName
End Sub
Note: the workbook must have been saved once in order to have a path.
Gord Dibben MS Excel MVP