This is a continuation of my thread in the Roku forum:
I'll recap that thread here, but it's there for reference if needed.
I have Emby running as a docker on my unRAID NAS. It is on an "Unassigned Device" which is a HDD outside of the array. I used "rsync" to copy all of my dockers, and videos, from an old 250GB HDD to a new 1 TB one. Everything works just as before, including "Continue Watching" videos. The one thing though that did change is that I can no longer delete videos from