Upload file like pdf and csv and not Image upload in Ui form

I want to create a ui component form which will have file upload in it. I don’t want to upload images. I found the code to upload but its image upload. I don’t want to have image upload just want file upload. Magento 2 How to Add File Upload Field in Admin Form? The code in this has image preview, which I don’t want. I also don’t want upload before the form is submitted.