df returns 216G out of 512 is used:
df -t ext4 -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 468G 216G 229G 49% /
The same data returns Discs app:
I have checked the files in many way and I can’t find where those 216G are coming from. Example:
How to diagnose what takes up the space?