Crucial X8 vs Samsung X5

I am talking about deteriorating down to 16MB to 20MB per second write speed. And the 2TB drive (bought in May 2021) has never been even half full. ****** Update 17 Mar 2022: Now I am using it on a new Macbook Pro with Thunderbolt 4 ports and cable. It seems to be working MUCH better now than before

The X5 did not come anywhere close to the promised 2800 write speed, but I can definitely say it's much faster than the T5 I own and my old hard drive. For kicks, I copied a 5GB file, planet of the apes to itself and that took literally 5 seconds. INSANE! I do want to say that the read speeds arent impressive. Copying(reading) that same file to my desktop from the X5, oddly only netted me 9mbs, and would occasionally spike up to over 100mbs

(2) As the available space decreases, so does the writing speed. When it reaches 80% it becomes slower then an old IDE hard drive. This thing has serious design issues written all over it. This is not a cable issue, i tried with the cable provided and other quality ones, and the behaviour is the same, you simply cannot use the whole capacity because as you begin to aproach it the writting speed becomes abismal

No Thunderbolt 3 at work. A USB-C port is not enough, you computer must support Thunderbolt 3.