For more details of downgrading firmware, see here As manufacturers have gradually discontinued the models of the UHD friendly drive, so it is recommended that you buy one Plug and Play UHD friendly drive as soon as possible before the professional sellers run out of stock. The good news is that there is not any risk if you buy one Plug and Play UHD friendly drive from a professional seller. Because the methods of updating the firmware are very complex, even if you can use some tool software to quickly complete the firmware update, there is still the possibility of failure. Risk Tip: We do not recommend that you update the firmware manually to achieve the UHD friendly feature, as this is likely to damage your Blu-ray drive. We call this kind of optical drives “UHD friendly drives”
Instead of executing the AACS 2.0 rules, they execute the AACS 1.0 rules, which allows us to decrypt and read them according to the blu-ray method. Some Blu-ray drives can read UHD discs because of certain defects.
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