Assuming your PC has a blu-ray reader, you need software like
MakeMKV that can read the discs and convert them into either .ISO (full disc w/menu) or .mkv (movie only) format. Be aware that the "full disc w/menu" format doesn't always work very well depending on the title, and the resulting file can be quite larger than just the .mkv movie (which would still be rather large if a 4k title).
Zappiti has a HDD compatibility list that says the RED drives are fine in everything except the DUO. I don't know why that is. You could always ask them I suppose.
Zappiti HDD compatibility FAQ
Edit: I see EVH78 beat me to it