Showing used space -but cant find where

[mk01]

if you run "mount" you will see line like this:

Code:

/dev/mmcblk0p2 on / type btrfs (rw,noatime,thread_pool=1,compress=lzo,ssd,space_cache,autodefrag)

the one column in red is fstype.
ok so no tags inside those windows, BTRFS (fifth column)