|I think the person that told you there were differences in the connector may have been blowing smoke. See the link below for details on all versions of USB.|
I suppose it is possible the thumb drive itself is constructed poorly and is not making contact properly or the ports themselves are lacking. I don't think the physical size and shape should be an issue.
There have been some growing pains with USB 3.0 ports and devices. I suspect it has something to do with the high versus low power requirements of the ports and the circuitry of the USB ports on the computer. See the link below.
Do you have a built in memory card reader? Laptops especially, have less USB controllers integrated into them. You may only have ONE. Check Device Manager to see if more than one controller is listed there.
Have you tried different thumb drives to see if it may be that particular drive?
message edited by OtheHill