Why won't my directory not save to the ZPool

I am trying to save my Plex setup to convert from Core to Scale but when I create the backup directory and try to copy my Plex setup it states that I am out of space. Then after trying to do some research and not seeing anything. I tried a restart. After restarting the TrueNAS Core system, the backup directory is not present in the system anymore. It would show before I restarted but is not there after the restart. I did this through the shell in the GUI and I did it on the system directly. I am running ver - TrueNAS-13.0-U6.3