I searched around for the solution and came up to this advice: https://html5.litten.com/updated-how-to ... ecame-raw/.
When I ran Analyses in the Testdisk I got the following warning and error message, which I have overlooked the first time.
I have read on one forum this might be because of the sector size change:
I did the Quick search showing that partition exists:This is acting like the drive was one of those external drives that when in the external unit the drive reports 4K physical / 4K logical sectors but when you pull it out and connect it directly to a SATA port it reports 4K physical / 512 logical and then the OS shows it as unformatted because of the sector size change.
And partition table is as it was when the disk was still bootable (including subfolders and files)
I wrote the partition table to the disk and restarted the computer (as in upper link). When reconnecting nothing changed. The disk is still not bootable, but now WIN10 shows one unallocated, one raw and another unallocated partition:
I repeated all the steps: partition table still shows the same folder and file order, but this time I am hesitating to write the partition table to the disk as I don't know what went wrong in the first place. Is there something else (besides warning/error messages) that I have overlooked? A friend suggested I should firstly make a backup of MBR? Or should I just copy all the files to the new disk?
Thanks to whomever helps; the disk is an archive of all my film projects from before 2010, so I really need a helping hand