The usage was during file transfer. Have determined the slow transfer speed on the Seagate Firecuda is due to a bad HyHD. In the process of getting an RMA. Not too happy with Seagate lately. ...

Thanks guys. I have all SSD's in my system except the Firecuda which is hybrid SSD/HDD.

This is my whole point of my question. I would think the speeds should be 300-500 like you said, but I am...

I have this same issue, but with all transfers between HDD's, SSD's, and USB's. Does not matter which lane/port data is transfered.

I am going with OP on this, as being a Windows 10 issue. ...

Anybody?

I have been having an issue with file transfers starting at 300MB/s then tapering down to around 20-30MB/s (as low as 6MB/s on the Firecuda) This is based on a 26.4 GB folder of Karaoke files (CDG &...