NGINX Can't download large file (6GB)

I have wordpress woocommerce on vps1 when a user buys a download and tries to download the file in the bowser from vps2 (which has all the files) the download file stops at exactly 1GB the files can be download completely if I download directly from the www index page but I do not want the users to know the url of my files, the files are between 1.5gb - 6gb and the webserver is nginx there is no php on vps2 just nginx, can you help and fix this?