Thank you so much, it works sharp, I didn't know that in the installation there was the option for USB.

Great!!!

Yes is a standalone version for usb devices, I downloaded from portableapps website.
I find very useful the portable version, actually I use only portable versions.

I have a portable version of Opera 25,
today opening it, I lost all tabs opened,
and looking in the history to recover it, I found all empty.