That makes Thunderbolt perfect for backing up data to external hard drives, transferring data between ... can be connected.
Some hard drives also provide additional features, such as built-in docks with lots of Thunderbolt and USB ports, or perhaps allowing you to open up the casing of the drive and insert a new drive ...
Both Thunderbolt docks and the best USB-C hubs and dongles provide legacy ports (USB-A, microSD, and others), and connect PC peripherals like mice, printers, external hard drives, and more.