My disc was made in September 2020. Purchased January 2021, firmware 3.10. Out of the box, it doesn't recognize any UltraHD drives. Fortunately, this can be fixed by flashing it with a modified firmware. Google Ultimate UHD Drive Flashing Guide Updated 2021 and follow the simple instructions. Took me 2 minutes to fix it and now it can read UltraHD. I'm taking a star off the rating because honest people feel like criminals if they don't want to pay twice as much for an UltraHD compatible disc.
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