The USB Mini-B is a five-pin connector that came out at the same time as the USB 2.0 standard in 2000. The new standard was an improvement over earlier versions and supported data transfer speeds ...

Like the Type A, the end that connects to the PC uses a USB 4-pin connector plug. The other end however, uses a smaller Type B plug to connect into a Type B jack located on the printer.

To quote Wikipedia, “the 24-pin double-sided connector provides four power-ground pairs, two differential pairs for USB 2.0 data bus (though only one pair is implemented in a Type-C cable), four pairs ...

The USB Implementers Forum (USB-IF) wants to simplify this problem by rallying behind the new Type-C connector, a new specification designed to replace current Type-A and Type-B plugs of all sizes.