Look out for an "SS" logo or symbol — this stands for "SuperSpeed ... to determine whether your hard drive or pen drive is USB 2.0 or 3.0 is to transfer a big file onto it and note the speeds.

as an extension of the logo series up to 40 Gbps introduced a year earlier. Meanwhile, the USB-IF also has logos for the maximum charging speed – in the case of USB4 version 2.0, i.e. 240 watts.