Free up space- /home directory confusion

Hi
Some confusion about my home directory.
If I issue
Code:du -chd 1 | sort -hI get
Quote:

0./dev 0./proc 0./sys 4.0K./cdrom 4.0K./lib64 4.0K./root 4.0K./srv 16K./lost+found 28K./mnt 132K./tmp 2.5M./run 13M./bin 13M./sbin 19M./etc 163M./boot 909M./lib 2.3G./var 2.4G./snap 6.2G./opt 14G./media 16G./usr 522G./home 563G. 563Gtotal

However if I navigate to /home on the Desktop I see

Quote:

Editor (3.6GB) Foo (41.8 Free space 17.8GB) Systemback (0 items) Timeshift (76.2 GB)

Adding up the contents of /home is obviously a LOT less than ./home (522G)

Can someone clarify the discrepancy?