ASUS BC-12D2HT firmware downgrade fails

[bdjones011]

I'm not the most technically proficient anymore and there are multiple forums to downgrade the firmware on UHD friendly drives. I have an ASUS BC-12D2HT drive running firmware version 3.12, manufactured in 2022. It is internal SATA. I found forum viewtopic.php?f=16&t=18933 and downloaded the flasher and firmware zip file, selected the v. 3.00 file for the 12D2HT drive and get Updating Failure #5. I searched ASUS and I'm understanding it is an access denied error. What is the process to allow access to update the firmware. Please treat me like a noob. I haven't delved into this type of downgrading before and need step by step instructions if possible. Please let me know what other details you need. Thanks!

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[Woodstock]

Isn't that one of the "encrypted" firmware models, which needs an encrypted version of the update put in it?

[d00zah]

Try the SDFtool Flasher when flashing from an encrypted FW.

[MartyMcNuts]

I'm not the most technically proficient anymore and there are multiple forums to downgrade the firmware on UHD friendly drives. I have an ASUS BC-12D2HT drive running firmware version 3.12, manufactured in 2022. It is internal SATA. I found forum viewtopic.php?f=16&t=18933 and downloaded the flasher and firmware zip file, selected the v. 3.00 file for the 12D2HT drive and get Updating Failure #5. I searched ASUS and I'm understanding it is an access denied error. What is the process to allow access to update the firmware. Please treat me like a noob. I haven't delved into this type of downgrading before and need step by step instructions if possible. Please let me know what other details you need. Thanks!
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As the guys have said, use SDFtool Flasher. It's the only oe that works with newer encrypted firmware. Also, you cannot flash directly to 3.00. Simply flash it to 3.11-MK and be done with it.