The two aren't in contradiction. The drive itself could be reformatted, destroying your data, and work as an internal. Likewise, a new internal drive could be installed into the enclosure.
The issues with sector size and placement make for a purely data-centric problem. The drive is the same an internal. The USB converter chip has had its firmware altered to write to it in a special way, so your data is effectively laid out in a proprietary fashion on the drive.
Ya I know the drive works since I know people do it obviously. I just was told I didn't have to format it at all from this forum lol. I had asked before I had purchased the drive and people said "load it up you'll be fine then take it out and put it in your PC!"
Then I learn the hardway that nope that's not how it works so now I get to buy another 4TB drive so I can get my data off the current one so I can reformat. Nothing wrong with having 10 TB of storage though!