How to Add Verbose in Backup Module

I am getting this following Error, Can we Add Verbose in Backup Module?
So please Help me out from this issue.

Import of duplicity.backends.dpbxbackend Failed: No module named dropbox
Reading globbing filelist /tmp/NBYjL62wAm
Local and Remote metadata are synchronized, no sync needed.
Warning, found incomplete backup sets, probably left from aborted session
Last full backup left a partial set, restarting.
Last full backup date: Mon Mar 14 23:42:50 2016
RESTART: Volumes 9 to 9 failed to upload before termination.
Restarting backup at volume 9.
Restarting after volume 8, file var/lib/nethserver/home/mceravolo/mail/kmw42f0d.default/ImapMail/, block 1350
[Errno 5] Input/output error


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