I'm trying to save some michi maps into the voobly aoc folder, but they don't show up in the game.

They're all rms files...don't really understand why?

Maps for regular AoC go into the Age of Empires II/Random folder (Or Age2HD/Random if you're using the compatibility patch).

Maps for a data mod (such as WololoKingdoms) go into /Voobly Mods/AoC/Data Mods/<mod name>/Script.RM