Our PDFs are stored on a network drive. All tests were run with the company VPN on. On site we are seeing combine speeds of ~90mbps. Off site with a 1gbps up/down connection we are seeing PDF combine speeds of ~5mbps. This was tested with 5 different users on 5 different machines. The VPN/firewall are not slowing traffic. We are able to read/write to the file server at ~500mbps.