1) They can be found at:
C:\Users\user_name\AppData\Local\THE_PLANE_EFFECT\Saved\SaveGames

2) Download my files from:
https://drive.google.com/file/d/1GyBmX_r-YEwdDaHfltlIIG74HXCSg82h/view?usp=sharing

3) Check whatever level achievements you need. Replace the folders and start the game

Here we go:

(not adding first two levels because they take couple minutes to complete)

Please note, if you want to do a certain escape/puzzle trophy e.g. avoiding tentacles, camera lights or rocket launch and if you fail in your attempt - close the game, erase current save and replace with a new one.

12th folder also has the last photo to pick and that's the only collectible in the entire game.