USB key mounted differently on the top of the page two USB ports

Mac Pro 6.1 (end of 2013), currently running 10.10.5 using a Lexar 128 GB USB 3 stick to the format ExFat.

When I plug the Lexar key into the slot at the top left of the Mac Pro USB, (reported as SuperSpeed USB 3.0 in report of the system Bus), it mounts instantly on my desk.

When I plug the stick Lexar on Mac Pro USB at the top right , (reported as Hi-Speed USB 3.0 in report system Bus) on the USB led blinks about 2 x a second - sometimes flashing a slightly different rate - then after about two minutes of this, he goes finally on my desk.

This behavior is expected, or should I take in a service call?

Yo have other USB devices connected to the other USB ports?

If so, disconnect those

Tags: Mac

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