How to insert upload file field into my form?

How to insert upload file section into my form

Here's a guide how to insert a File Upload field in the form:

1. In your Form Builder, click the Basic Fields. After that, select File Upload and drag it in your form.

2. Here you can change the Max File Size limit and activate Allow Multiple upload.

Also, here are some related guides: 
Which-file-types-are-allowed-for-the-upload-field
Jotform-Now-Supports-Multiple-File-Uploads
Changing-the-upload-size-limit

Hope that helps. Let us know if you need further help. Thank you!