as of 2015/2016 most of the standard PC motherboards don't have a FDD port on them. so you need a PCI card to connect an internal 5" FDD which was correctly described in the episode. however 5" floppies won't be readable due to their age. they stopped producing them ages ago and magnetic surface degrades over time. also the "ancient" notebook/laptop computers depicted in the episode obviously contained 3" drives not 5".