Backup fails cannot mkdir

My backuo job fails trying to make a directory based on a zip file it is trying to copy. I think that windows is presenting the contents of the zip file so the mkdir gets an invalid name to create. It only seems to fail on zip files as follows;

Backup Job Name: docs
Backup Job Type: Incremental
Protocol: cifs
Backup Source: [remote:cifs]///192.168.0.8/Users My Documents
Backup Destination: [Backup]/
Backup Start Time: Sun Jul 5 2015 16:10:14
Backup Finish Time: Sun Jul 5 2015 16:15:18
Backup Status: Fail: failure during copy.

Cannot read HHH Documents/tabular/p60.pdf
Copy File Outlook Files/Outlook Files/admin@lemarcheduquartier.com - newpete.pst
Copy File Outlook Files/Outlook Files/archive1.pst
Copy File Outlook Files/Outlook Files/capture@francedirect.com - newpete.pst
Copy File Outlook Files/Outlook Files/live Recovered Recovered Recovered.pst
Copy File Pete/My Documents/020821.zip
Cannot mkdir Pete/My Documents/DataTables-1.10.5 (1).zip/DataTables-1.10.5
Cannot mkdir Pete/My Documents/DataTables-1.10.5.zip/DataTables-1.10.5
Cannot mkdir Pete/My Documents/DataTablesEditor (1).zip/php
Cannot mkdir Pete/My Documents/Editor-PHP-1.4.0.zip/Editor-PHP-1.4.0
Cannot mkdir Pete/My Documents/EditorGenerator.zip/EditorGenerator
Cannot mkdir Pete/My Documents/Ex_Files_DtW_QR.zip/Ex_Files_DtW_QR
Cannot mkdir Pete/My Documents/mAttachmentSaver.zip/mAttachmentSaver
Cannot mkdir Pete/My Documents/themeforest-4287447-the-retailer-responsive-wordpress-theme-wordpress_theme.zip/theretailer
Cannot mkdir Pete/My Documents/themeforest-4287447-the-retailer-responsive-wordpress-theme.zip/The Retailer
Cannot mkdir Pete/My Documents/themeforest-9719682-luster-the-biggest-real-estate-wordpress-theme.zip/Demos XML
Cannot mkdir Pete/My Documents/themeforest-9719682-luster-the-biggest-real-estate-wordpress-theme.zip/__MACOSX
Cannot mkdir Pete/My Documents/wp-all-import-pro (1).zip/wp-all-import-pro
Cannot mkdir Pete/My Documents/wp-all-import-pro.zip/wp-all-import-pro


This is a ReadyNas 104 with Firmware 6.2.4

Regards
Pete