Do you have to be a “nerd”

Unfortunately, I don't understand the app. Especially the hints that lead nowhere. I go to "Available Shares" because dragging and dropping the movie folder directly into the app doesn't work. Where can I find that? There's a "My SMB," whatever that is. But after three minutes, it says an error has occurred. It's certainly not intuitive. I can access all the data smoothly via Finder. I thought that would be enough.