Think back, to the day when we used to run everything off floppy drives, and then hard drives showed up. The first hard drive I ever experienced was a 5 Megabyte drum drive. It was HUGE for the time. AND fast. Then spindle drives came out, and were so much faster (and more expensive) AND could fit inside a computer. Then the drives kept getting faster, and more Storage, and then they started to shrink and
Now we're running up to limitations of that class of hardware that new classes (SSD vs Magnetic) are starting to impact the Hard Drive space. The change is coming and once the Spindle drive disappears (like floppies), you'll wonder how we ever lived like that.