So this morning, we could not save to the DNS-323. A popup indiacted that we do not have permission to do so. Also noticed the activity light is continuosly blinking. Using the admin interface to do a reboot did not resolve the issue. Using the power button to do a hard reboot allowed us to save and copy files to the unit again. But, the middle activity light is still continuosly blinking. Unplugging the network cable from the rear of the unit kills the light. So how do we tell if there what is causing the blinking light? Could this be a sign of failure on the unit (since we got the permission denied error earlier today)? Most importantly, how do we fix the blinking light?