Disk apparently full despite only ~25% being reported in baobab


The problem

I am using Ubuntu 18.04.1 and have an encrypted home folder.

I am having this weird problem where baobab only reports on ~95GB of my data, whereas df -h tells me my Ubuntu partition has 480GB with a usage of 100%.

The usage of 100% is something I cannot explain, but bothers me a lot and creates problems.

My home directory, with ~78GB (reported by baobab), makes up for most of the 95GB mentioned above.

I don’t really know how to proceed from here. Please help me find out what is going on and where 75% of disk usage come from that I cannot account for.

Appendix

df -x squashfs -x tmpfs -h -T

Filesystem               Type      Size  Used Avail Use% Mounted on udev                     devtmpfs   16G     0   16G   0% /dev /dev/nvme0n1p7           ext4      480G  447G  8.7G  99% / /dev/nvme0n1p1           vfat      646M   77M  570M  12% /boot/efi /home/sebastian/.Private ecryptfs  480G  447G  8.7G  99% /home/sebastian 

sudo du -hs /* | sort -h

0       /initrd.img 0       /initrd.img.old 0       /proc 0       /sys 0       /vmlinuz 0       /vmlinuz.old 4.0K    /cdrom 4.0K    /lib64 4.0K    /srv 16K     /lost+found 40K     /media 48K     /dev 176K    /root 3.0M    /tmp 3.2M    /run 5.8M    /lib32 6.5M    /libx32 13M     /sbin 14M     /bin 21M     /etc 234M    /boot 516M    /mnt 848M    /lib 1.2G    /opt 6.5G    /usr 12G     /snap 146G    /home 712G    /var