USB 3.0 External hard drive working only as USB 2.0

Hello all.
I have a MacBook Pro mid 2012 (specs below) which has two USB 3.0 ports. I have a Kingston USB 3.0 stick and a Toshiba 1TB USB 3.0 external hard drive. With Lion/Mountain Lion/Mavericks, both stick and hard drive worked fine, but since I updated to OS X 10.10 Yosemite, both work as USB 2.0 devices, with slow transfer speed and, in the case of the hard drive, it has a blue/white LED that indicates the mode (blue = USB 3.0 / white = USB 2.0) and it only lights up with white color.
It's not a device problem, because both work on Windows 8.x machines. I was guessing that it was some kind of firmware or motherboard's usb driver problem but I looked for firmware updates and found nothing.
Is anyone having issues with USB 3.0 ports? Can you help me with this? Any advice would help.
Thanks a lot for your patience and help.

Hi jesusbet,
Thanks for visiting Apple Support Communities.
It sounds like the USB 3 ports on your MacBook Pro are not operating at the expected speed.
The first troubleshooting step I'd suggest in this case is to reset the System Management Controller (SMC) on your MacBook Pro using these instructions:
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
From:
Intel-based Macs: Resetting the System Management Controller (SMC)
If the symptom continues, you can also reset the PRAM:
OS X Yosemite: Reset your computer’s PRAM
These two hardware resets can resolve many unexpected behaviors that affect hardware on a Mac.
All the best,
Jeremy

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