I’ve found several threads on here from people who have (like us) had problems with recording. Sony support have been very unhelpful (stock reply to check updated software) and advice about which programmes cannot be recorded. I contacted the supplier of our twin tuner KD43xh8505bu -they replied that recording via USB is notoriously temperamental on all TVs but that getting an external HDD that is compatible is critical - and that when such a HDD is used then recording can be flawless. I’m very interested to learn if anyone has achieved success and if so with which HDD. I can’t find this on any Sony support article. Thanks