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As the disk is using NTFS, can you try on a windows in cmd (Right-click run as administrator) a "chkdsk /f d:' (replace d: by the correct drive letter).
What is the result ?

The bug may be in testdisk or in libntfs-3g.
It's usually hard to fix a bug without a mean to reproduce the problem but please share the gdb output (Run "gdb testdisk_binary core_file" and type "bt full" at the prompt) or the core file, I will see if I can do something.

https://www.cgsecurity.org/testdisk_doc/after_using_photorec.html give some tips on how to deal with duplicated files
PhotoRec can skip the allocated blocks, so if it recover a file that is not deleted, it's because it has recovered a deleted copy...

ext3 and ext4 purge the metadata when a file is ...

There should be no need to rewrite the partition with TestDisk.

With the partition unmounted, can you try "fsck.ext4 -a dev/sdc2" ?
If it failed, please paste the output. If it works, mount the filesystem and check if you can see your missing files.
Also check the lost+found/ directory, sometimes ...

Hello
Names starting by a dot are hidden...
I will publish a new 7.3-WIP that doesn't do it under Windows as it's a Unix/Linux/mac tradition.

You can try TestDisk, select the 2 TB PhysicalDrive, Analyse, Quick Search and Deeper Search. If you are lucky, you will see your old partition. If it's the case, use the arrow keys to switch this partition to P(rimary). On next screen, choose Write, confirm, and Quit.
If it doesn't work, try ...

Usually, the passes are only
- pass 0: finding the blocksize
- pass 1: data recovery

There may be extra passes when
- FAT unformat (can only be enabled in expert mode),
- Keep corrupted files as be set to Yes, (By default, No)
- Paranoid : Yes (Brute force enabled) (By default, yes, Brute force ...

Assuming you had an NTFS partition as currently listed in your screenshot, try to follow
https://www.cgsecurity.org/testdisk_doc ... oot-sector

TRIM may be prevent recovery, another possibility is BitLocker disk encryption.
Can you check if it's enable ?

A little post to thank you for your donation ;-)

When running TestDisk, try TestDisk, Advanced, select the "BackyL" partition, List. If you see your files (with a non-empty size), you should be able to copy them.
You can also try "Scrounge NTFS" to recover files from your NTFS partition but it ...