What is the currently listed for your drive?
Here is the most common and recommended method. It involves two flashes to ensure a clean and safe transition. bu40n 1.00 firmware
| Feature | Stock 1.14 (New) | Stock 1.03 | | | :--- | :--- | :--- | :--- | | UHD Ripping | No | No (Blocked) | Yes (Full) | | MakeMKV LibreDrive | No (or partial) | Yes (With patch) | Yes (Native) | | Sleep Bug | Yes | Yes | No | | Read Speed (BD-100) | 2x (Throttled) | 4x | 6x-8x | | Downgrade Possible? | N/A | Yes (to 1.00) | N/A (Is target) | What is the currently listed for your drive
If your LG BU40N reports in MakeMKV, you have a golden drive . Never update it. It will handle 4K UHD ripping better than almost any other slim drive on the market. | Feature | Stock 1
Most modern Blu-ray drives are restricted by a security feature called AACS 2.0. This encryption blocks computer drives from reading 4K UHD discs directly to prevent piracy.