I checked my PHP settings and there is no log file. I have tried changing the script from the offline historical device section, when the drive is plugged in but not mounted, and also when I mount it. I have been at this for some time now and I feel like I am just making a dumb mistake. The only time I can invoke a log message is when I select "default", change the code, and then save.
I get "Mar 18 20:28:09 NAS unassigned.devices: Warning: Cannot use '/boot/config/plugins/unassigned.devices/' as a device script file name." I also try changing the file name and then get "Mar 18 20:25:51 NAS unassigned.devices: Warning: Cannot use 'asdfasdf' as a device script file name."