External hard disk showing unallocated after plugging to Win

[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\AA010116131122394547&0

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

Location Path:

Migration Rank: 0xF000FC000000F120

Present: false

Status: 0xC0000719

[Lardman]

Buffalo HD-PCU2 is just the enclosure. Open it up, connect the drive direct to the PC to check if you have an enclosure or drive problem.

[hardis2030]

I tried that. But then it will be showing as unknown device in the device manager.

[Lardman]

Any odd noise from the drive, is it spinning does it spin down after a while? Make and model of the drive rather than the enclosure?

If the drive is spinning and is not shown in the bios, (don't bother with windows device manager) with the correct capacity when directly connected there is very little you can do without professional tools. If the data is important find a local DR pro.