Works on version 0.9.0.0
Go along the path: C:\Users\*User name*\AppData\LocalLow\Kinetic Games\Phasmophobia
copy all the files from the folder and transfer them to another location,
In case of force majeure delete SaveFile.es3, SaveFile.es3.tmp.bak and saveData.txt
Transfer the downloaded saveData.txt to the same folder
Who plays a licensed game, remove the save synchronization from the Steam Cloud
I'm not responsible if you get banned or you break something. If you still broke the game, then do not be afraid and just put back the old files, which you saved before.
Author: Aligator Kot