The wpforms_upload_root filter is used to define the directory on the server where files uploaded through WPForms are stored.


(string) URL used for the default path of storing files uploaded through WPForms.



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The wpforms_upload_root filter can be used to define where the files uploaded through WPForms are stored.


 * Change the path where file uploads are stored in WPForms.
 * @link
 * @param   string  $wpforms_upload_root  root path of where file uploads will be stored.
 * @return  string

function wpf_dev_upload_root( $wpforms_upload_root ) {
    //Define the path for your file uploads here
    $wpforms_upload_root = '/home/mysitedomain/public_html/custom-dir';  
    return $wpforms_upload_root;
add_filter( 'wpforms_upload_root', 'wpf_dev_upload_root', 10, 1 );

This change will change the location of where the files are stored. This will not update the email notification URL.

Article Reference: How to Define a Specific Directory For File Uploads