Desktop Operating Systems and Recovery

I hope someone can help, could not find information anywhere to handle this:

The D drive (Data) disappeared from my PC. I have updated everything on the software side, problem persists. I have added a lot of data to 😧 after last backup.

Tried this information (video lasts 1:46), but cannot go through:

[edit ]

The thing is that when I go to disk management window, I fing Disk 0 and Disk 1. Disk 1 is ok and shows its status as "Basic". "Online" and "Healthy".

Disk 0 shows as "Unknown", "Not Initialised". When I hit right button on it's thumbnail, and go to "Initialise disk", GBT is selected, I hit ok, I get error message "The specified disk is not convertible because the size is less than the minunmum size required for GPT disks".

Again went to right button and chose properties.

General: Location: Bus number 0, target id 0, LUN 0. Should there be something else than 0? Says working properly...

Volumes: Type unknown, status not initialised, partition style not applicable... 0 MB

Driver: 21/06/2006, 10.0.17134.1

Events: 29/06/2018 19.36.58 --> device migrated; device configured (disk.inf); device started (disk)

Obviously something has gone wrong 29/06/2018 19.36.58 and at that time no-one was using the PC so it has been an automatic update.

Further info from the three time stamps:

Device SCSI\Disk&Ven_&Prod_\5&4daba29&0&000000 was migrated.

Last Device Instance Id: SCSI\Disk&Ven_&Prod_\5&4daba29&0&000000
Class Guid: {4D36E967-E325-11CE-BFC1-08002BE10318}
Location Path:
Migration Rank: 0x0
Present: false

Device SCSI\Disk&Ven_&Prod_\5&4daba29&0&000000 was configured.

Driver Name: disk.inf
Class Guid: {4D36E967-E325-11CE-BFC1-08002BE10318}
Driver Date: 06/21/2006
Driver Version: 10.0.17134.1
Driver Provider: Microsoft
Driver Section: disk_install.NT
Driver Rank: 0xFF0005
Matching Device Id: GenDisk
Outranked Drivers:
Device Updated: false
Parent Device: PCI\VEN_1022&DEV_43B7&SUBSYS_10621B21&REV_02\4&3683a1e&0&0114

Device SCSI\Disk&Ven_&Prod_\5&4daba29&0&000000 was started.

Driver Name: disk.inf
Class Guid: {4D36E967-E325-11CE-BFC1-08002BE10318}
Service: disk
Lower Filters:
Upper Filters:

Anybody else having problems after yeasterday?

- Sara