Even if you do that, u will never be able to use as much disk space as before. 1 of the main reasons I paid to get the HR34 was for its amount of disk space for recordings, now they slashed it after they got my money. That is NOT ok with me and shouldn't be with anyone. That is false advertising! at the very least they could have warned us about this loss of space so we could prepare for it or let us have the option to opt-out of the software update
For the life of me, I can't see why a person who does a lot of recording on a 34 doesn't use an external HDD. My first thought when the 34 was released was the stock internal HDD was too small for five tuners. I'd have at least a 2TB on that, if I were you. Had you done that when you got the 34, you wouldn't be having the problems you're having now.