So I had a 120GB ssd with about 10GB of storage left. I bought a better larger ssd that I want to clean reinstall windows on and delete all the old files from my 120gb ssd. I installed Win10 on a 2.0 USB and am in the process of installing windows. It has been 2 hours and I am on 15%. Why is it taking so long? I've done this before and it's never taken this long. Is it because the USB is 2.0, because the old SSD is slow and only had 10gb of available space left?