I upgraded my NAS. Had two disks in 1 storage pool, but they were two (seperate) volumes. I copied files from one disk but I forgot to do it for the other. Long story short; I now have the other disk (with files sitting on it) but no way to gain access to the files.
I figured this out:

Volume 2 is the one I need, Volume 1 is the other disk (which I have copied).
I installed Linux and diskmanager tells me this:

I don't know which steps to follow with Testdisk.
So far I got:
selected the disk (/dev/sdd)
GPT (recommended)
Output:

Hit quick search, output:

Am at loss since the numbers (start position and ID(?) (1.41.12-2636) dont match. Any suggestions, ideas?
And now i'm kind of at a loss the start sectors are different from the windows app (1st screenshot).
If I select one of the options I get no partition found and need to do a deeper scan.