windows 10 "we couldn't create a new partition or locate an existing..

I am trying to install windows 10 1909 downloaded from microsoft download page into my m.2 drive. I want to use mbr system so I made sure that my m.2 drive is mbr using AOMEI partition tool but the problem when I run the windows 10 setup I get this error when I select my m.2 partition

we couldn't create a new partition or locate an existing one

I tried the steps in this link but it did not work:
How to Solve the Error "We Couldn’t Create a New Partition"?

I tried also to convert my drive to GPT but I get error : partition is of GPT style !!!! however I want to use mbr so please help me to install it a mbr

Thanks

Have you enabled legacy BIOS mode (Legacy CSM)?

FreeBooter said:

Have you enabled legacy BIOS mode (Legacy CSM)?

yes it is CSM and in boot menu it is "legacy + UEFI" , the other option is UEFI only

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topgundcp said:

NOTE: Also make sure that your MB support Windows Installation on M.2 disk.

I get same error

You have to convert the disk to MBR by executing following @topgundcp Diskpart command.

FreeBooter said:

You have to convert the disk to MBR by executing following @topgundcp Diskpart command.

it is mbr I made sure. I will reboot to make sure I booted as legacy

Open Command Prompt and execute following commands:

Code:

Diskpart

List disk

Please post screenshot of the Command Prompt.

I rebooted and made sure I booted from legacy but I still get same error

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FreeBooter said:

Open Command Prompt and execute following commands:

Code:

Diskpart

List disk

Please post screenshot of the Command Prompt.

it is disk 0 and I still get same error !!!

Disk 0 is MBR. Do you get same error from Diskpart when you try to create partition?

Have you disabled Secure Boot?

FreeBooter said:

Disk 0 is MBR. Do you get same error from Diskpart when you try to create partition?

no I can create partition using diskpart without any errors.

I am trying from 2 days going around myself