/dev/root always full

[subaquatic]

Hi and thanks for a great lightweight distro!

I'm running into an issue where processes fail because /dev/root is filling up. I ran dietpi-cleaner with all options turned on and it finds a few MB, but not much.

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root@DietPi:~# df -h
Filesystem                Size  Used Avail Use% Mounted on
/dev/root                 1.7G  1.7G   16M 100% /
devtmpfs                  237M     0  237M   0% /dev
tmpfs                     242M     0  242M   0% /dev/shm
tmpfs                     242M  5.0M  237M   3% /run
tmpfs                     5.0M     0  5.0M   0% /run/lock
tmpfs                     242M     0  242M   0% /sys/fs/cgroup
tmpfs                      10M  964K  9.1M  10% /DietPi
tmpfs                      20M   20K   20M   1% /var/log
tmpfs                     242M     0  242M   0% /tmp
/dev/mmcblk0p1             56M   21M   36M  37% /boot
/dev/sda1                  30G   45M   28G   1% /mnt/usb_1
//192.168.8.20/D$/Video/  2.8T  363G  2.4T  13% /mnt/htpc
tmpfs                      49M     0   49M   0% /run/user/0

I read that Debian sometimes creates orphaned files if network shares aren't properly mounted, but I haven't found any files in the mount directories, and my one network share is working fine now.

Any ideas where else I could look?

[subaquatic]

Found it!

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umount /mnt/usb_1
rm -r bt-inprogress

1 GB free