said by Libra:
I used a link with my browser, Pale Moon (http).
How do I know if I'm using file sharing across the WAN?
If you're downloading via browser link, you're almost certainly using http or ftp. SMB/CIFS would not be used. That being the case, the unusually slow transfer could have been an issue at the server's end or perhaps some type of network issue somewhere in between. Hard to say without more visibility into the end-to-end path.