file sharing between host and remote computers

how do i share files from the host computer to the remote computer? I have tried to find topics over the internet but it al explains how file sharing is done, and i did all that. I can’t just drag and drop files, I was thinking of trying to add my remote computer in the network of my host computer, but still haven’t been able to figure oout the settings.

At work I have an office network router at home i have a bell sympatic router. Any help please