External hard disk showing unallocated after plugging to Windows 11

[hardis2030]

I have a 1TB Buffalo HD-PCU2 hard disk which was working perfectly.
Today for the first time I inserted it into a windows 11 system. It showed the new drive in the file explorer for a few minutes (though not accessible). After that I could not see the drive.
After that checking from the disk management, it is showing uninitiated & unallocated. Also the 1TB drive is showing up as a 2TB drive.
I tried with other machines having windows 10. But it is not working.
Can anybody help me find how I can recover the data from the drive.
The driver events are given below
Device USBSTOR\Disk&Ven_BUFFALO&Prod_HD-PCU2&Rev_0108\303030514234443137303734&0 was configured.

Driver Name: disk.inf
Class Guid: {4d36e967-e325-11ce-bfc1-08002be10318}
Driver Date: 06/21/2006
Driver Version: 10.0.22000.1
Driver Provider: Microsoft
Driver Section: disk_install.NT
Driver Rank: 0xFF0006
Matching Device Id: GenDisk
Outranked Drivers: disk.inf:GenDisk:00FF2002
Device Updated: false
Parent Device: USB\VID_0411&PID_01D9\303030514234443137303734
-0

Device USBSTOR\Disk&Ven_BUFFALO&Prod_HD-PCU2&Rev_0108\303030514234443137303734&0 was started.

Driver Name: disk.inf
Class Guid: {4d36e967-e325-11ce-bfc1-08002be10318}
Service: disk
Lower Filters:
Upper Filters:
-0

Device USBSTOR\DISK&VEN_BUFFALO&PROD_HD-PCU2&REV_0108\303030514234443137303734&0 was deleted.

Class Guid: {4d36e967-e325-11ce-bfc1-08002be10318}
-0

Device settings for USBSTOR\Disk&Ven_BUFFALO&Prod_HD-PCU2&Rev_0108\303030514234443137303734&0 were not migrated from previous OS installation due to partial or ambiguous device match.

Last Device Instance Id: USBSTOR\Disk&Ven_SanDisk&Prod_Extreme&Rev_0001\AA0 10116131122394547&0
Class Guid: {4d36e967-e325-11ce-bfc1-08002be10318}
Location Path:
Migration Rank: 0xF000FC000000F120
Present: false
Status: 0xC0000719

[PeterOz]

Was the windows 11 new system or an upgrade?
The firt thing I would try is boot a ubuntu usb or dvd and see if that will access the drive.
make a ubuntu bootable usb or dvd
Create a bootable USB stick with Rufus on Windows | Ubuntu NO install needed

[hardis2030]

the windows 11 was an upgrade. I will try the ubuntu boot method

[hardis2030]

It is not showing in Ubuntu

[PeterOz]

My guess is your drive is gone.
You can try to update the win 11 machine with the drive attached - update the Windows 11
Update the chipset drivers
I would NOT update the bios (incase you find that answer)
Do you have a windows 7 machine - Family or friend.
Is the data on the drive important ?

You can’t see the drive in Win 10, Win 11, Ubuntu - Not looking good.
I don’t think you will get an answer from Reddit. Bleeping Computers gave the same advice they think your drive is shot
If you need the data then
Try this Does Initializing a Disk Erase Data? No Data Loss Solution
or try this Hard Disk Shown as Unknown: Learn How to Fix It

I have not tried any of the above and I do not know if you will be asked to buy software from either site

[hardis2030]

Okay will try updating the drivers. Seems like it is gone. But the data is important. so trying to retrieve it in anyway.

Thanks for the support

[Bruce]

@hardis2030 - still need help?

[Bruce]

closing thread