Supplier Frontend - Downloadable Products
The admin can allow suppliers to create downloadable products.
Please navigate to System → Configuration → Supplier Frontend Product Uploader→ Products Settings in the Magento Admin Panel.
Next, set " Allow to create downloadable products" to 'Yes'.
In Downloadable Product Settings section, choose the Extension type and Maximal File Size of your downloadable product.
To add a Downloadable Product, please go to the Vendor Portal and click on "Add a Product" in the navigation bar.
Now you can easily choose Downloadable Product in Product Type field.
When in the "Add Product" form, on the right side, the supplier will find fields to upload the file on the bottom of Product Categories.
The other fields of the new product are described in Supplier Frontend - Adding Products article.