Type-A plugs and receptacles from both USB 3.0 and USB 2.0 are designed to interoperate. Type-B plugs and receptacles in USB 3.0 are somewhat larger than those in USB 2.0; thus, USB 2.0 Type-B plugs can fit into USB 3.0 Type-B receptacles, while the opposite is not possible.ype-A plugs and receptacles from both USB 3.0 and USB 2.0 are designed to interoperate. Type-B plugs and receptacles in USB 3.0 are somewhat larger than those in USB 2.0; thus, USB 2.0 Type-B plugs can fit into USB 3.0 Type-B receptacles, while the opposite is not possible.