something went wrong, maybe you tried to save to SD when there was no SD and so now a regular directory /media/jack/JEVOIS was created. You should delete it, usually in /media you only want directories created on the fly by the system as you insert hardware. For that:
- disconnect flash card, jevois camera, etc
- rmdir /media/jack/JEVOIS (may need sudo)
- you may have to reboot your host so it won't want to use JEVOIS1 anymore
from this error you mentioned: "Error releasing /media//JEVOIS -- ABORT"
it looks like your username is not being detected by our scripts. It should have your username (jack) between "media" and "JEVOIS". We used the unix command logname to get the user name, but maybe we shoud use variable $USER instead. Can you please report what you get when you type, in a terminal: