Wondering is there some kind of compatible serial cable, usb cable or something around for me to use to transfer files between the two (windows to linux, or linux to linux or v. the previous)?

Jack Wallen shows you what might be the easiest method of transferring files between Linux desktops on the market.

How to Transfer SFTP Files on Linux. File Transfer Protocol client applications let you to transfer files back and forth between your computer and another computer running an FTP server application.

You can access Windows Subsystem for Linux files using Explorer on Windows 11/10. Open Explorer from WSL Terminal or launch the root from Explorer.

If you need to share or transfer files between Linux machines, you have plenty of options. Here are some you might not have considered.