no
Use a usb to transfer things from your PC to xbox, and vice versa.
The USB 2.0 and 3.0 device will work. USB 3.0 is backwards compatible with USB 2.0.
Yes if your phone is USB 3.0 and not USB 2.0.
Onboard USB are USB ports built into the motherboard.
It is not compatible with USB 1.1 but it is compatible with USB 2.0 and mostly it matters on what motherboard you have. With USB 2.0 is a USB 3.0 port, the speeds will be the same but if it is a USB 3.0 in a USB 3.0 port, the speeds will be increased to about 4.8 - 5 Gbps compared to 480 Mbps.
The usb cable extension is made by another usb cable. The cable is made with one usb connecter and 1 usb connecter. You can simple attach the extender cable to your usb.
They work with any computer that has a USB port, to a USB device.
Most computers have USB 2.0 built into them.Some older computers have USB 1.1, but it isn't very common these days. USB 2.0 is backwards compatible with USB 1.1, so USB 2.0 devices will work with USB 1.1 ports. However, if you use a USB 2.0 Device with a USB 1.1 port, the device will only operate at USB 1.1 speed in that port.
USB
A USB 1.1 device yes, but the USB 2.0 will be scaled to suit the 1.1 speeds
The square port is USB 2.0, and the flat and wide one is USB 1.1.