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BU40N > BU40N 1.03MK

What is the best FW for LG BU40N slim drive? Is it still 1.03MK, the latest MK or original FW 1.00? Some people seem to suggest 1.00.

So, it sounds like I should avoid Buffalo drive and go with real LG BU40N slim?

Yeah, I'm aware of absurd requirements concerning official UHD BD playback in PC realm. Not really something I would venture myself. I trust my Oppo 203 and Chinoppo players.

I haven't bought it yet. Would LG BU40N and external USB3 enclosure be better option than this Buffalo drive? I believe they are same unit, Buffalo is just rebadged. I think LG BU40N is also official UHD BD drive so it would work with Powerdvd Ultra.

If bought now and is new stock, what is the FW version in it. Is it still BN12? I'm planning to buy EU version. Precise model is BRXL-PT6U2VB-EU. Is it ready for 4K backupping if I flash it with MK BU40N-BN12 fw (HL-DT-ST-BD-RE_BU40N-BN12-0M01001-211905141415.bin) ? What if it comes with BN13 firmwa...

Why would they release AACS2.1 titles in pairs? Where does this information come from? Is it a cost factor?

Moreover, why use v2.1 on catalog titles and not brand new ones? Mind-boggling...

What would be the best FW option for my LG BH16NS55 drive (EU) with original 1.02 fw. Currently it works flawlessly and LibreDrive is supported. Would upgrade/sidegrade/downgrade to some other fw offer improvements like even faster ripping speed or no "sleep bug"? Any suggestions?