Possible firmware issue with new drive

[madmayhem]

I rarely post to forums so sorry if any of this is done incorrectly.
I'm new to ripping and got a WP50NB40 NB52 drive. It works great for blu-rays but I wanted to try 4K/UHD. I flashed it but it isn't able to read 4K disks. The drive still works with other disks and the updated firmware is showing in MakeMKV (I included a screenshot). I'm wondering if I missed something or if it could be that my drive was manufactured rather recently (April 2026) and maybe SDFlasher doesn't work with it. Whatever the reason, I'd really appreciate the help or a link in the right direction! Thanks!

[Sayaka]

I cannot see your screenshot. Please post your MakeMKV drive info, you should be able to copy & paste it. I suspect you only did the first step of the flashing process correctly, thus enabling LibreDrive but not 4K playback.

[Billycar11]

I rarely post to forums so sorry if any of this is done incorrectly.
I'm new to ripping and got a WP50NB40 NB52 drive. It works great for blu-rays but I wanted to try 4K/UHD. I flashed it but it isn't able to read 4K disks. The drive still works with other disks and the updated firmware is showing in MakeMKV (I included a screenshot). I'm wondering if I missed something or if it could be that my drive was manufactured rather recently (April 2026) and maybe SDFlasher doesn't work with it. Whatever the reason, I'd really appreciate the help or a link in the right direction! Thanks!

See guide below for step by step of how to flash that drive.

Or email me or Marty for an automated flasher
See below for email