attached files

Hi,
I would have an attached files in the mail-reply of users that compile contact form 7 form, sent automatically.

How is it possible?
I see the field: ‘Attached’ with a text box, in mail section of contact form, but I don’t know if it’s the field I have to use to solve my problem or how to compile it correctly.

Thanks

https://ww.wp.xz.cn/plugins/contact-form-7/