Went through a couple of 16gb cheap usb thumbdrives on my TCL Roku.
Finally switched to a microsd from my old Canon camera with the usb adapter. I figured this card was designed for multiple re-writes without failing. Got exactly 20 days out of it before TCL/Roku TV came up with message that the USB was not found and Live Pause will be terminated.
I don't have an issue buying a new sd card / drive / adapter but would prefer it if TCL/Roku would come up with a suggested brand that it know to work.
Lastly, would love to hear back from some long term external HD users to see if that worked?
Quick update. I was able to re-format both the "dead" cheap thumbdrives and the microsd on my computer (using linux). Both were then identified and worked again. Leads me to believe it's a software issue on TCL/ROKU's part. Had just updated automatically overnight to latest version as well.
Second update. Reformatted USB failed after a couple hours. Replaced with the reformatted SD card. Worked until next morning then got the same black screen as everyone else. I'm going to consider this feature as "Broken" until such time as ROKU addresses.