System volume root usage (/dev/md0) at 100%

Hi, thanks for the response. I did a little more searching just after I made the post and think I'm in a good place now.

You're right, there were more of the chunk files (1461 written to the root!) and removing them appears to have solved my problem.

After doing that, I think I'm ok with root looking like:

root@TXHReadyNAS:~# cd /

root@TXHReadyNAS:/# ls -1

1

apps

bin

boot

data

dev

etc

frontview

home

init-stream0.m4s

init-stream1.m4s

lib

lost+found

media

mnt

opt

proc

root

run

sbin

selinux

srv

sys

tmp

usr

var

root@TXHReadyNAS:/# df -h

Filesystem      Size  Used Avail Use% Mounted on

udev             10M  4.0K   10M   1% /dev

/dev/md0        3.7G  649M  2.9G  19% /

tmpfs          1009M  8.0K 1009M   1% /dev/shm

tmpfs          1009M  468K 1009M   1% /run

tmpfs           505M 1000K  504M   1% /run/lock

tmpfs          1009M     0 1009M   0% /sys/fs/cgroup

/dev/md127      1.9T  729G  1.2T  40% /data

/dev/md127      1.9T  729G  1.2T  40% /home

/dev/md127      1.9T  729G  1.2T  40% /apps

I'm really not sure what could have caused Plex to behave this way initially, perhaps I did something wrong when installing/updating it some time. Any way, I have removed and reinstalled Plex using the GUI. No signs yet that it is writing unwanted stuff to the root again, but I will have to keep an eye on it I guess.