My only suggestion, in that case, would be https://www.ccleaner.com/recuva or something idk
Well...yes, you'd need to connect the drive to a computer. Whether it's as connected as external storage or not is largely irrelevant. I'm not too familiar with the details of how you'd go about doing so, unfortunately. (I take it this isn't an external drive with a USB connector or something? :P )
It's the HDD that came in my laptop. One of my main concerns is that I can't just pop it into a pc as the functioning drive and work from there; as part of diskpart, my OS on it was uninstalled and wiped, and any attempt to reinstall Windows or use the drive normally in the first place ultimately fails because of whatever happened to it, thus making the consideration of such an option at this point out of the question. My best bet at this point would probably be to install Recuva on this computer, find a way to connect the HDD to it, then work from there. Recuva says the things that it can work on include external, damaged, and/or newly formatted drives. I can only hope something works out in the end...
