Hi sorry again, my command of English isn't that great, so just wanted to confirm with you, all I need to do is first, back up my MO2 mods location which is in my appdata, then I copy the whole content into anywhere that is NOT appdata, and thats all I need to do? Please reply. Thanks!
All you really need to do is hit the "Instance" button (first button on the menu bar) and select portable. Then move the files/folders from the appdata folder to the MO2 folder. The great thing about MO2 is one install can be used for all your games when using "instances", however, when used as "portable" it behaves more like the original MO and stores everything in the MO folder. When using portable, you can only use MO2 for one single game...meaning you have to have an install of MO2 for each game when using portable.
Personally, I have MO2 set up to handle my "playing" from instances and, thus, a single install. Then I have two additional installs of MO2; one for Skyrim LE and one for Skyrim SE, which I use strictly for mod authoring. This keeps my authoring files completely separated from my the installs that I use to play the game.