Ah, thank you for following up then!
I am not sure how long I needed to run the test so I stopped when there was no improvement.
Here are the results of test 1:
root@Tower:~# dd if=/dev/nvme0n1p1 of=/dev/null bs=1310720 skip=0 iflag=direct conv=noerror status=progress
43972034560 bytes (44 GB, 41 GiB) copied, 32 s, 1.4 GB/s^C
33920+0 records in
33919+0 records out
44458311680 bytes (44 GB, 41 GiB) copied, 32.3474 s, 1.4 GB/s
Here are the results of test 2:
root@Tower:~# dd if=/mnt/disks/Sam4tb/Test.mkv of=/dev/null bs=1310720 skip=0 iflag=direct conv=noerror status=progress
22972989440 bytes (23 GB, 21 GiB) copied, 11 s, 2.1 GB/s
18570+1 records in
18570+1 records out
24340223273 bytes (24 GB, 23 GiB) copied, 11.5635 s, 2.1 GB/s
Here is the drive listed using 'df'
/dev/nvme0n1p1 3748905808 49940604 3698965204 2% /mnt/disks/Sam4tb
I hope I ran these tests correctly. Please let me know if these results are expected or if there is anything else I can provide,