XPS 8940, your device would work faster connected to a USB 3 port

Don't know what model you have, nor how you got the message or what it looks like.

However, the lower ports are USB 2.0 (tabs usually White), and the upper Blue ports are USB 3.0.

Simple put, USB 3.0/1 ports are faster than USB 2.0 port. Ergo, your transfer speed will be faster. See https://www.diffen.com/difference/USB_2.0_vs_USB_3.0

This assume you have an external USB connected SSD of course.

However, I suspect that is not what you might be asking about?

Are you asking why your M.2 SSD is the only one you have and it is on the motherboard, not a USB port?

If so, more info would be needed, like XPS Model, any device attacked to the USB port, etc.

I THINK I might know what it's whining about.  Am using a type A USB to type C USB cable for the SSD.  Perhaps It's whining that I'm not using a USB C to USB C cable and a USB C port on the computer because C ports are theoretically faster.  Since there's no USB C connector on the BACK of the XPS 8940, I'd have to use the only C-type USB port on the computer, which is on the FRONT.  Guess I could try that and see if I still get the message.

@dalewebb​ 

Yes, only one is on the front... try it, but I'm wondering if there could be a cable issue?

'What' gave you that message? Dell h/w or Windows? When do you see it?

@ispalten​ Sorry, I WISH I could remember/figure out where I've seen it.  Probably running some utility or other.  If I get it again, I'll try to document it.

Thanks.

@dalewebb​ 

Probably was, a utility like an IObit one or Glary Utilities... when they do a 'performance/Optimize' operation they will report stuff like that.

If you were to make the change, you probably wouldn't even notice it.