This take up around 10TB over 4 drives, I've used different drives for specific purposes, specifically PS on it's own (big files), my local C drive for weird and wonderful roms that need to be near their emulators as well as a couple of other bigger drives for most of the other roms. I don't use a NAS but I expect that may return to haunt me... lol. As for a platform audit, I have a list of all systems and games count breakdowns on the YT page, is that what you're looking for? I don't have a complete breakdown of every system with every game, that would be... difficult...