2 - 4 horas
Mac Mini uses 7200rpm (or lower) with 500gb or above HDD and it was time to upgrade the speed to a SSD!
It was not as easy as shown in the video (or manual),
few things not shown/discussed is how to get both drives (SSD/HDD) aligned, it was the trickiest part.
and that the mac mini fan connector must be lifted up with your hands rather than use the supplied plastic pen (which did not help at all)