USB Connectors - As we said in the previous item, USB has evolved focusing on compatibility. With almost two decades of development, it is still theoretically possible to use a USB 3.1 USB stick on a USB 1.1 port. We say ?? theoretically ??, because the USB 1.1 port may not offer enough power for a 3.1 device, but there are no incompatibility issues, so to speak. What happens is that the transfer speed is limited to the smaller version (in this case, the USB 1.1 port)

TYPE A - All USB connectors are compatible with each other. And this is where the letters come in. The type "A" is the most common, indicating the inputs on PCs and notebooks that we are so accustomed to.