The "Upload Files" add-on allows to add the uploaded files through the forms to the Media Library, and access to them from the pages and posts of website.
Furthermore, it allows to include the support of new mime types, than files format supported by default by WordPress.Documentation
Easy to activate
To activate the add-on, simply visit the plugin page through the menu option: "Settings/Contact Form to Email", tick the checkbox: "Uploads", and press the "Update" button...
Upload files settings
...the add-on includes a new section in the plugin settings to include the uploaded files to the media library, and entering the extensions of new files that would be accepted by WordPress.
The uploaded files are included in the media library to be used with the posts and pages of website.