For reference, these are the results of the HDDScan

And heres a screenshot from windows:

I can't seem to see any data on the HDD anymore since its not being recognized as formatted, so there's no way to make a backup! The drive still shows up in Windows Device Manager, but it shows up in Windows as a RAW drive (primary partition), with 2 other unallocated partitions. It was originally formatted as NTFS. I tried booting from Linux Ubuntu but can't see the the drive either.
I have already connected it to different machines and on an HDD dock as well. Still the same.
What do the HDDScan results mean? Can you recommend other troubleshooting and data recovery software/methods? Would running these utilities cause further harm?