Dropwow app allows paying in bulk. It's not about uploading a file but the app fulfills orders automatically. It works this way - a consumer places an order on your Shopify store, this order is automatically sent to the supplier together with the address and it's paid. When the parcel is shipped, a tracking number is displayed.
Dropwow has a feature of bulk payment.
Our platform supports shopify users to connect our APP to automatically synchronize orders and pay in bulk. We can also purchase your order products for you, you do not need to separate the order products in person. This will save you a lot of time. And we can provide more cheaper products than Ali. We charge our drop shippers only products cost + shipping cost if products are from our warehouse. Also, our APP is free to anybody. You can check detail here: https://cjdropshipping.com/2018/03/28/cjdropshipping-service-fee/