When I start my laptop all my files are gone
I just installed ubuntu 14.04.1 from my flash drive, installed a few things and copied some files. When I restarted the laptop the files were gone, the softwares I installed weren`t there anymore and there`s and now there`s an icon (right above the files icon) that says install ubuntu 14.04.1 LTS. And also, the flash drive has to be connected in order for ubuntu to start. What am I doing wrong? Do I have to install it and copy the files again? And how do I keep this from happening again?