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So, the suggestion to use a USB 3.0.....is that just to say that a cable between the printer and computer would solve the problem with the wireless connection between printer and computer? If so.....Well YEAH!
Connecting the printer up to the computer with a USB cable will OBVIOUSLY solve the wireless connection....because you wont be using the wireless connection anymore....because you connected it with a USB cable.
In anycase.....connecting a printer to a computer is ALWAYS better with a USB cable than to rely on a wireless connection between the printer and computer. Its just the nature of wireless, is NOT ALWAYS reliable...however, a USB cable IS ALWAYS RELIABLE!.
Does that help?