Generally the answer with All-in-One's is that you cannot do such upgrades.
In this case it might be doable but it's not easy or supported by HP. You would have to replace the a part in the system with a new HP USB 3.0 Front Assembly as described or shown here: https://www.google.ca/search?q=P+us...es_sm=93&ie=UTF-8#q=HP+Usb+3.0+Front+assembly
But there's no guarantee it would work.
Now if you had a normal desktop tower than it would be much easier and you would just add an expansion card to an free slot.
Yogi support is all about getting your money and not providing quality service; they excel at marketing, I would avoid them like the plague. Find a local small shop and provide them with the info if you don't want to attempt the upgrade yourself.
In this case it might be doable but it's not easy or supported by HP. You would have to replace the a part in the system with a new HP USB 3.0 Front Assembly as described or shown here: https://www.google.ca/search?q=P+us...es_sm=93&ie=UTF-8#q=HP+Usb+3.0+Front+assembly
But there's no guarantee it would work.
Now if you had a normal desktop tower than it would be much easier and you would just add an expansion card to an free slot.
Yogi support is all about getting your money and not providing quality service; they excel at marketing, I would avoid them like the plague. Find a local small shop and provide them with the info if you don't want to attempt the upgrade yourself.