Fantastic application. I use it to sync my retro game saves: retroarch, dolphin, PCSX2, etc. Got it on the Steam Deck and Windows Desktop. They all sync with the NVIDIA Shield, which is always on. Works fantastically well and doesn't seem to noticably impact the Deck's battery life.
if you stall your games to the same general folders or even if you don't you just think all the folders contain the data that you want with the other machines to the right location and your games will synchronize between all your devices