Recently I have been using a bootable CD of CHIRP to take with me to radio club (Voice of Idaho) activities to help newbies program their radios.  Works great, but I thought that a thumb drive would be handier since I could store some data files on it.  Now, I have a fair familiarity with Linux but this stumps me.  I created the boot-able thumb-drive and copied the CHIRP data files to the documents folder on it.  They went on with no error messages and opened in CHIRP.  Everything seemed fine until I rebooted the system and found that those data files were gone.