You need to create a table to copy deleted (archived) files into that mirrors the target table where the data is stored.
Then an append query needs to be created using the table with the stored data in being copied to the newly created table.
You now need to attach this append query to a delete button on the form using the following VBA Code:
DoCmd.OpenQuery "Nameofappendquery", , acReadOnly
This should be inserted before the delete command lines.