Model archiving and organization?

Bit of a weird question but how do you store and organize your models/STL files?

I do most of my CAD in OnShape these days so I have The Cloud for all the convenience and future horror of that. And... when I grab stuff from one of the sites like thingiverse... I SHOULD save the model but I don't and it has only bothered me once when I lost my webcam cover. And I probably spent more time searching for a replacement than it took to just make my own.

But I want to get more into kickstarters (... I feel dirty) and buying cool models and those I DO want to archive and save.

Most likely I'll just make a folder structure and sync it to my NAS with syncthing. But are there any better/more elaborate solutions? One of those "have server, will spin up container" things but figured I would ask first.

Thanks.