www.makemkv.com

Its working! So don't use USB, but connect the BU40N with a SATA adapter directly to your PC.
Thanks again for your help!

if you can only have the option of using Amazon.de, then the link below is the same product, but obviously much more expensive. https://www.amazon.de/-/en/Adapter-Slimline-CD-ROM-Optical-Driver/dp/B0C9T78N3V/ref=pd_sim_d_sccl_4_5/260-1962981-3796744?pd_rd_w=Vuk7g&content-id=amzn1.sym.e53442b4-e...

Thank you for your advice! I ordered a similar device at amazon (the dealer from the the link you shared does not deliver to Germany...) and I will report back once I have connected the BU40n directly to my PC. Have a nice day!

Hi there, it seams I have a similar problem with my HP BU40N (BW43): The SDFtool Flasher says that this drive has not the MT1959 plattform... Therefore I'm not able to update the firmware. So do I get this right? The issue is not with the drive itself but with the way I connect the drive to my PC? R...