Hi,
In the frontend of Odoo you only have the option to make a copy with or without filestore at the current time of the execution of the action via the database manager using your master password.

If you only want to have the data that was created up to a certain point in time, I would recommend getting the data directly in the backend via SQL query. Alternatively, you can of course also export the data as an xlsx or csv file in the frontend by filtering on the creation date of the respective data.

Regards,
Chris Dominiak (Intero Technologies GmbH)