This is what it looked like during the scan (~two hours):
https://i.gyazo.com/1ac9b7fa9a111b5deeb ... 2e351a.png
After I stopped the scan, it looked like this:
https://i.gyazo.com/c9e20421c8d094689fb ... 42e385.png
When I double clicked the "Basic data partition" that has a Start value of 16 MB and Size of 5.46 TB, it shows all of the folders that I saw when I ran testdisk, in the "root" folder. It also has a metafiles folder with a subfolder that is named $Extend.
I checked the folders that I wanted to recover and clicked on the "recover marked" button. It gave me the 256 KB limitation... I don't know if I should buy the R-Studio NTFS version or the regular R-Studio (both are in the list of products that the limitation box says can recover)... Going forward I will try to have 3 backups of everything (one on the HGST, one on the "backup SSD", one on my C drive (M.2 SSD)).
This is the "Disk Management" screen (Disk 0 is the drive I am trying to recover):
https://i.gyazo.com/238d787420119c2e5b7 ... 93684d.png
I'm not sure what you want me to screenshot, jol