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