Adding Larger SDD to Precision 5680

Ok so, I have a desktop with two (2) 2TB drives.  On the main drive, I have close to 1 GB of data with maybe a third of it stored on OneDrive which I use for work.  There is about 1TB on the other drive mainly videos and personal Onedrive storage.

So I bought a Precision 5680 mobile with 256GB SSD with the idea of duplicating my current setup but I am not married to it.   So the question is how do I do that?  I was thinking of taking the 256GB out and using my desktop to clone it to a 2TB drive and doing the same with the other because it was so much faster than my external USB with the older connector.

So the drive in the 5680 is 5 pins plus 29 which is "M-key", correct?

However, it looks like these new USB-C are much faster.   So I assume the device linked below would be faster than getting a SATA adapter and doing it internally with my old desktop?

https://www.amazon.com/SSK-Aluminum-Enclosure-Adapter-External/dp/B07MNFH1PX/