Upload size limit

Hi everyone, I have Nextcloud setup on Unraid. Everything is running perfectly, but I can’t figure out how to change the file size upload limit in Nextcloud. I’ve been through all of the config files and all, I’ve changed a couple of settings to 16G, but it still isn’t allowing over 4G. I also tried WebDav and still get the same thing. Can anyone help me find the right spot and what I need to change? Thanks!