Re: Ubuntu on USB Plz Help! :(
Hi, and welcome.
As I understand it, the reason for having a LiveUSB with persistence is to avoid wearing out your USB stick by writing to the same place on the stick's memory too often.
It is possible to install Ubuntu to a USB stick as to any other USB block device (like an external drive), but then you won't have the benefit of the above mentioned protection scheme.
Never upgrade your working system to the newest release without thorough testing on the actual hardware you will be running it on.
Never perform a system update in a live session
Installed Ubuntu Touch 1.0 on my Nexus 7. And loving it!