TL;DR: Buy the Samsung T5 portable SSD for only $269.99 at Amazon. That's a savings of $210 for a whopping 2TB of external storage you can access any time.
Back in the dark ages of personal computing, 2TB of storage was but a mythical unicorn out of reach for mere mortals, a pipe dream fantasy buried under a pile of detritus called "floppy disks." That was then, this is now. Welcome to the future where we have solved the data storage problem, even if we still don't have flying cars.