Playing with Hard Drives
One of the easiest things to do is to buy a hard drive, and over a period of time fill it, and then get another drive, and a third, and a fourth, and a fifth. People will go from a small drive, to a larger drive, and a larger drive after that and backup plenty of the files across three to five drives. The result is that you have terabytes of storage, and some files are “backed up” on every drive, whereas others are precariously stored on just one drive.