I'm back up to 93% on my Roamio Pro. So far I have not run into an issue like this. I was thinking about getting a 4TB drive to put in, but it is just too expensive. Or I would need to go for some time without it. Either way I'll need to just stick with it. If I had picked up a plus last year then I could pick up a less expensive 4TB configured to put in it. But I can't do that with the Pro.