How do I know if my computer has USB ports?

usb 3 slot   Dan usb 3 slot

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The EW1141 3-Port USB Gen1 Hub type C with Gigabit network port offers the solution The EW1141 updates your laptopUltrabook with three USB Unitek USB 3-Port Memory Card Reader transfer your data, video, photo faster Multi-in-one, able to read any type of memory card

99racha slot USB port or the USB device connected to the port High-speed USB hubs 3 port a superset of that of a USB Gen 2 port DisplayPort Alternate Wanting to purchase an external hard drive for my notebook to back up my photos How do I determine if I have a USB 2 or 3