Please Help – Need a quick and dirty DVR solution on NVidia Shield for tonight!

Running Jarvis on my Nvidia Shield (16GB), also installed the HDHomerun app and it works great for watching live TV.

I have a really important show I need to record tonight (friend of mine is going to be on TV) so I’m not looking for a long term solution, just a quick and dirty one so I can schedule the recording and save it. Can this be done? What do I do to make it work? The Shield is connected to a NAS for storage if there’s a way I can configure it to write the DVR files to that? Otherwise I could plug in a flash drive?