USB to SSD and NVME

[T_Minus]

Transferring video footage (4GB files) on Windows from USB to my desktop I noticed a performance difference that seems odd.

Background:

• Win10 \ 5900x \ 32GB \ Optane Boot\OS\App drive
• I transferred part of my video footage to one drive and part to the other once completed. (Same port, same memory card, etc...)
• Both SSD and NVME are used for storage only. (No VMs, Apps, etc, running from them)
• The faster transfer occurred after the first, once the drive was warm -- but switching back to SSD, it did not go >125.

• Transferring to 400GB SSD (S3610) I was maxed out at 125MB\s.
• Transfering to 1TB NVME (P4510) I was maxed out at 165MB\s

What could possibly cause this?

 

[PithyChats]

Were both drives 512 format? What was the USB formatted as? Same file system on both destination drives? How was the NVME connected - U.2, pcie slot?

My first guess - drive format and file system.
Second guess - SATA overhead / DMA for NVME.