Problem installation

[jtouso]

Trying to install from usb-pen after using in live mode without problem
All ok but it stops and it is not finishing the installation
The stop is...."Copying usr/share/themes/Adwaita/gtk-3.0/gtk-widgets.css"
Asus eeepc 901 with two sdd disks.
Root in first disk (the fast one) formated as ext4
Help?