Since my TV has an option to pause live TV by storing the buffer on a USB device, is there a way that I can use the USB port as a DVR? All I need is an app to record the content on to the USB drive. I figure it's already recording the content to the USB drive anyway for the pause buffer.
There's no known way to do it currently. If Roku is working on something like this, they never acknowledge it until release. No you do have another option. A device called the HD HomeRun connects to your cable/TV antenna and your network, and serves as a networked DVR and can stream the recorded video to a networked device. I prefer to use a computer with a TV card, so I can edit the commercials and other fluff from the recording.
Dan Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.