I love the Shied Pro paired with Channels DVR. I have two 2Terabyte Solid State Drives connected to the two 3.0 USB ports for DVR recordings and it usually works flawlessly until recently.
I think one of the most recent update needed more testing as I’ve had to reset the Shield a few times recently to address a weird issue. A power reset didn’t help. Did you already check to see if the Shield is running on the most up to date firmware.
You can reset the Shield in the same place that you check for updates.
Try this. Go to the Shield settings “Gear” icon, scroll down to Device Preference and select “Info” then either Check update or Restart to reset the Shield. Good luck.