Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding General Nexus mods

There should be instructions in the download, or on the mod page. In general, mods distributed as pak files get copied to the '..\Documents\Larian Studios\Divinity Original Sin 2 Definitive Edition\Mods' folder, while files/folders are copied (or extracted) into the game's install folder (usually '..\Divinity Original Sin 2\DefEd\Data' or one of the subfolders in the Data folder).