When I am out of the country I need to connect to my home network to get files from my server. How do I connect to my home network when I am out of the USA.
There are many variable factors and many methods;
If there are a reasonably small number of files, the easy way is to park them on google drive, icloud, microsoft's onedrive, etc., so you can access them from anywhere and the rest is someone else's problem. The hard way is to set up dynamic DNS, port forwarding, and some sort of secure vpn on your computer or at least an encrypted ssh login for the file transfers. And then hope it doesn't go down while you are away.