USB 3.0 connectors are often in blue color or with 'SS' logo to help distinguish them from previous generations. USB 3.0 connector is designed to support 5Gbps bandwidth 'SuperSpeed' data transfer, whereas, lower data rate can be transmitted with backward compatibility to USB 2.0 ports. However, USB 3.0 Type A processes additional pins that are not in the USB 2.0 A Type. Inheriting the same design to the A-Type connector used in USB 2.0 & USB 1.1 application, USB 3.0 A is also provides a 'downstream' connection that is designed for use only on host controllers and hubs. USB 2.0 A Female to Crimp Housing Cables.Be aware that typical A-A cables are not intended for connection between two host computers or computer to hub. Though not that common, USB A male to A male cables are used by some implementers to make connections between two USB A style female port. As such, it is important to remember while purchasing USB cables it is safest to make sure at least one of the plugs is a USB A. This is because USB host will supply a 5V DC power on the VBUS pin. USB-A socket is designed to provide a 'downstream' connection intended for host controllers and hubs, rarely implemented as an 'upstream' connector on a peripheral device.

Also known as USB standard A connector, the USB A connector is primarily be used on host controllers in computers and hubs.

Usb 2 vs usb 3 current capacity