So i've had 2 Portable 4TB HDDs (S: and T:) that i've been downloading all my games onto as a sort of backup, the idea is not fill them up so i have space for updates and new DLC, about ~500GB each. now these drives are nearing that level and while i can download 100% of my collection before then, if i get any new, more recently released games i might need a third hardrive.
now currently i know that if i remove one of my drives Steam will just indicate that the games are not installed so i was thinking of creating Categories/Collections for which drives they are installed, that way if i get more games and get a third drive (U:) and not have T: plugged in, i wont mistake a game that it already download and installed with one that isn't, but with a large collection of games i can't remember which is installed onto which.
i can script something outside of steam to look in the manifest files and see if they are installed on S: or T: but the tedious part is then putting them into the category/collection. then i remembered the console, i can auto-generate a console script i need to know what to generate and i've had no luck finding a definitive list of console commands ([i did find this but from 2016 and might not have the possible commands for Collections)
So is there a way to add a game to a Category/Collection via the console?