Verbatim 43888 won't read 4k disks after flash

[KCSsFactor]

Hello I recently purchased a Verbatim 43888 and tried to use MakeMKV to test it out on one of my 4k disks. It read the disk but wouldn't open for me to rip. So I did the process to flash the drive. I followed all the steps I could find online including YouTube videos. It doesn't matter which BU40N file I pick. Now it won't even read a 4k disk but it can a bluray.

I tired 3.0 and type c ports. Even got a powered USB hub to try that out and nothing gets it to read the disks.

I am stumped and hope someone can help.

[MartyMcNuts]

Hello I recently purchased a Verbatim 43888 and tried to use MakeMKV to test it out on one of my 4k disks. It read the disk but wouldn't open for me to rip. So I did the process to flash the drive. I followed all the steps I could find online including YouTube videos. It doesn't matter which BU40N file I pick. Now it won't even read a 4k disk but it can a bluray.

I tired 3.0 and type c ports. Even got a powered USB hub to try that out and nothing gets it to read the disks.

I am stumped and hope someone can help.

You can start by pasting the text from the MakeMKV drive info and libredrive info sections.

[KCSsFactor]

Screenshot 2026-08-21 185737.png

Hope this helps

Drive Information
OS device name: E:
Manufacturer: HL-DT-ST
Product: BD-RE WP50NB40
Revision: 1.03
Serial number: MOEP9KG0343
Firmware date: 2120-05-07 09:29
Bus encryption flags: 17
Highest AACS version: 82

LibreDrive Information
Status: Enabled
Drive platform: MT1959
Firmware type: Patched (microcode access re-enabled)
Firmware version: 1.03
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Yes
Unrestricted read speed: Yes

[Billycar11]

Screenshot 2026-08-21 185737.pngHope this helps

Drive Information
OS device name: E:
Manufacturer: HL-DT-ST
Product: BD-RE WP50NB40
Revision: 1.03
Serial number: MOEP9KG0343
Firmware date: 2120-05-07 09:29
Bus encryption flags: 17
Highest AACS version: 82

LibreDrive Information
Status: Enabled
Drive platform: MT1959
Firmware type: Patched (microcode access re-enabled)
Firmware version: 1.03
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Yes
Unrestricted read speed: Yes

So where in the guide did it say to flash to bp50nb40?

Please follow official guide below
Or email me or Marty for the auto flasher

[MartyMcNuts]

Screenshot 2026-08-21 185737.pngHope this helps

Drive Information
OS device name: E:
Manufacturer: HL-DT-ST
Product: BD-RE WP50NB40
Revision: 1.03
Serial number: MOEP9KG0343
Firmware date: 2120-05-07 09:29
Bus encryption flags: 17
Highest AACS version: 82

LibreDrive Information
Status: Enabled
Drive platform: MT1959
Firmware type: Patched (microcode access re-enabled)
Firmware version: 1.03
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Yes
Unrestricted read speed: Yes

WTF!!! Why on earth would you cross-flash a BU40N!! All you had to do was flash it to BU40N 1.03-MK and you would be done.

Use SDFtool Flasher and follow the instructions in the SDFtool Flasher thread for BP50NB40 SVC NB52 to RECOVER this drive back to BU40N firmware.

[KCSsFactor]

Thanks guys. First time doing this so followed some YouTube guide. Think that is where I messed up. Didn't know I had to hit recover to switch it. That worked. Sorry for being dumb about this.