Hi @sweetzdreams101,
Thanks for following up.
We can certainly understand your inquiry that you want to play an external file on your Roku Ultra.
We would recommend taking a look at our Support page for more information about all the requirements for How to use Roku Media Player to play your videos, music and photos | Official Roku Support
We hope that we have addressed your question appropriately, but reply to this message if in case you've still got any questions, and we will gladly follow up.
Best regards,
Mary
Mary F.
Roku Community Moderator