Hi @Trustworthy,
Thanks for the inquiry, and welcome to the Roku Community!
Please be aware that we cannot guarantee that a hard disk will function without an external power source.
For more information, check out this support article on how to pause live television on your Roku TV system.
We hope you'll find this helpful info. Let us know if you still have any questions.
Best regards,
The Roku Community Team
John
Roku Community Moderator