well if you had space left, you could try to install agedu and have it generate a useful webgui graph of the most used directories and files
Agedu - A Useful Tool for Tracking Down Wasted Disk Space in Linux (tecmint.com)
This also records when files are access creating a log which could cause issues
If you had a desktop like xfce you could run qdirstat
GitHub - shundhammer/qdirstat: QDirStat - Qt-based directory statistics (KDirStat without any KDE - from the original KDirStat author)
ncdu is a cli disk analyzer
How To Analyze Disk usage on Linux using ncdu | ComputingForGeeks
Was your dietpi_userdata originally stored on your sd card, and not mounted to an external drive? If so, that is where a huge amount of data is stored
would it be possible to unmount all external drives/mount? This would allow us to check where space is used. Or can you connect SD card to another Linux box?
I finally figured this out. Took your advice @journilar and unmounted the NAS shares. However, the mount points were still folders on the /root drive. Took me a while to realize that the /mnt/TV folder wasn’t empty. There were a handful of folders and files in there. I assume that my NAS was unavailable, and the apps still downloaded files, but couldn’t move them to the NAS.
I’ll remember this in the future if my NAS has a power outage, and I have to manually turn it back on.
Much better :
root@pi-usenet:/mnt/Seagate# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/root 29G 2.1G 26G 8% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 8.0K 3.9G 1% /dev/shm
tmpfs 1.6G 22M 1.6G 2% /run
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 3.9G 4.0K 3.9G 1% /tmp
tmpfs 50M 468K 50M 1% /var/log
/dev/mmcblk0p1 253M 35M 218M 14% /boot
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