The Contact Form module doesn't include a File Upload option. The types of fields that are available by default for the Contact Form module are:
- Input Field 
- Email Field 
- Textarea Field 
- Checkbox Field 
- Radio Buttons 
- Select Field 
You can install the Divi Contact Form Helper plugin to gain access to a File Upload option.
Using Divi Contact Form Helper to add a File Upload option
- Install and activate the Divi Contact Form Helper plugin. 
- Open the Contact Form module and Add a New Field. 
- Set the field's ID - use only English characters and no spaces. 
 Example:
 - Incorrect field id:- This is my field ID
 - Correct field id:- this_is_my_field_id
- Choose the field's Label text. This text will be displayed on the front end for that particular field. 
- Expand the Field Options group and select the field type to be Input Field. 
- Expand the File Upload Settings option group. 
- Enable Use As File Upload Field. 
- Set the Maximum Number of Files that a user is allowed to upload. 
- Use the Allowed File Types section to choose which file types can be uploaded. 






