Small hard drives vs high capacity hard drives

Hi, is it more convenient to use a high capacity hard drive or multiple hard drives with a small capacity?

I wonder, how the speed on reading the plots in the hard drives is important to farming if theres a chance to farm every 9 seconds, i assume the plots must be read and compared in 9 seconds if you have 10tb , i think it’ll be impossible to read 10tb of data in 9 seconds even worse the reading will be slower if you have a single hard drive probably a little faster with multiple hard drives