[Trisquel-users] Deja Dup fails to launch

[yeeehi]

I added Backup to Accessories in my menu launcher, so that I could easily  
launch Deja Dup.

I click on Backup and Deja Dup gives me an error message: Backup Failed.  
Volume doesn't implement mount.

This is the first time I have tried to use Deja Dup on this system.