What cloud service are you using for that 500 GB?750+ games amounting to almost 500 GB in total have now been uploaded safely to a cloud. It took time, effort and much of my remaining sanity but it's finally done. GOG Galaxy is now but a memory and I'm glad to see the back of it, to be honest. Old games in the cloud and new games from Steam - that's the way forward. Steam is at least good for keeping games updated and the workshop is a neat bonus, I guess.
Going forward I'll also use Launchbox as a hub for my games and it's looking pretty good so far, especially with the Big Box mode that comes with Premium.
This is what Big Box looks like by the way, although it can change appearance pretty jarringly depending on what theme you're using:
And I know I could Google it, but could you give a TLDR version of what LaunchBox and Big Box is?