Script never finishes

[dabbill]

I am trying to backup / update my backup of pictures. The script runs for a while, then I start getting: drivesink-sync:156 upload Error uploading file. We will retry. Error: ('Connection aborted.', error(32, 'Broken pipe'))

Is there anything that can be done that will only attempt to upload files that are not currently backed up? I have 20,000+ pictures that need to get backed-up. Every time the script starts, it starts from the beginning. So it never makes it through all of my pictures.

Regards, Dabbill