—
Card Reader. Devices designed primarily for reading various types of memory cards. They may have USB ports (see "USB inputs"), but usually less than one (very rarely two). There are both external and internal (see "Purpose").
—
USB hub. He's a "splitter". A variety of peripheral devices designed to increase the number of working USB ports in the system. The hub has several own USB inputs (usually at least 4), and only one such port is used to connect it to a computer. Thus, by connecting, for example, a 4-port hub to a computer, you will get 4 instead of one USB port. Such devices can be useful for those who have to use many USB devices at the same time, as well as for owners of compact laptops where there are few standard connectors. However, keep in mind that the power of one port may not be enough to power all the peripherals connected through the hub, for more details see "Connecting the power supply". Models of this type are only
external(see "Purpose").
—
Card reader / USB hub. External (see "Purpose") devices that combine the functionality of the two types described above: they have both slots for memory cards and USB ports, which allows them to be used as both card readers and hubs. However, it is worth noting that USB ports in such models are usually fewer than in full-featured hubs, and some even h
...ave only 1 USB input.
