This, of itself, is not difficult. However, if you see the need to change the USB more than once (for testing different os versions for example) you will find something like this useful:
https://www.amazon.co.uk/dp/B0953LMVJH? ... tails&th=1
It needs to be UP-Angled (Down-angled will conflict with casing)
It needs to be Flat/Slim version with ribbon cable (Modular plugs with a cable do not fit)
20cm ribbon is adequate, 50cm is long, 100cm is excessive
I mounted the USB socket using velcro on the inside of the side casing next to the fan.
CAUTION:
1. The usb ribbon cable is self-assembly. Do not lose the clips!
2. When removing motherboard and/or the rear panel it is possible for the power button cap to part company with the switch. It can fly anywhere and is hard to find, especially on a dark carpet
Not too hard to replace, but you do need to make sure the switch is centered on the aperture in the back panel, otherwise it can catch. I loosely attached the motherboard screws first, made sure the panel fit was ok, then tightened everything.Yes, I know you probably would like pictures, but there aren't any
I was too (.........) [You name it] looking for parts on the floor..........The usb ribbon can also be applied to other models when appropriate.