Steam doesn’t need a separate download directory and STATE files, so you can ignore those steps. According to my research: you basically repeat the above process but swap Uplay and Steam around.
If you’re trying to go from Uplay Free Weekend to Steam Full Copy, apparently that’s much easier to do.Again: you do not gain Renown bonuses for completing any objectives which you already previously completed – the rewards are as if you had your previous progress saved. Situation progress is reset: You’ll keep any Renown / XP gained and will not gain any duplicate rewards for completing previously-completed mission objectives, but you’ll be back at Situation #1 with no displayed stars.Loadouts are reset: you retain access to anything which you’ve already unlocked but will have to re-equip them (scopes, alternative weapons etc).Renown and unlocks (including Operators) are saved, at least when I went from Free Weekend to Standard.