When looking at its properties, it shows up as the following, with a clearly malformed name:
In Disk Management, although it was given a drive letter (G:), its other attributes are simply blank:
I've also tried running the Data Lifeguard tool that Western Digital offers itself, with no luck, initially it failed its tests due to some kind of cable read error, so I replugged it in and, for example, when running the Extended Test (which should take at least SOME time) passes it instantaneously.
So clearly, for whatever reason, it no longer has an identifiable boot sector, making recovery kind of difficult. I've searched around the internet, and at this point it appears that if I can't resolve this through some software, I'll have to try and extract the hard disk from its casing and plug it in as an internal drive and see if it works properly then. Any thoughts/help would be much appreciated!