sudo sh -c 'echo blacklist ehci_hcd > /etc/modprobe.d/blacklist-ehci'
sudo update-initramfs -u -k `uname -r`

Test if the copy/write process is stable, and if you want to disable USB 2.0 upon boot, type:

To disable USB 2.0, type this in the terminal:

sudo modprobe -r ehci_hcd