It must be something related to SD card. I just tried some type of SD Card formating because it was full and now my sd card kinda merged with the system storage. When I remove the SD Card it says 128 of 128gb full. But before opening the screen from the print it says 40gb occupied...
I've recently updated the system too, might be some bug, but I've seen this problem in many other posts from 3, 4 years ago.