Last year’s introduction of the Power Mac G5 made USB 2.0 ports standard issue. These ports complement FireWire for the connection of DV cameras, hard drives, scanners, and a variety of input devices.
Your laptop's USB version is hiding in Device Manager ...
Stop plugging your mouse into a USB 3 port—5 reasons USB 2.0 is secretly better ...
We’ve said it before, and we’ll say it again: USB-C is confusing. A USB-C port or cable can support a range of speeds, power capabilities, and other features, depending on the specification used.