I have seen many discussions on this board and many others about Roku's (and other video players) inability to read ExFat drives, but I have not seen anyone request that feature be added to the Ultra. I also have been reading that many people seem to have trouble reading HFS format on the Ultra. Perhaps I am incorrect, but isn't the only reason that people purchase the Ultra is to get the USB access?
So this is my official request, ROKU, please add ExFat access to the Ultra.
Another option would be to add access to an ExFat app the way Synology does it. Yes, it costs $3 but solves ALL the incompatibility issues.