I use rsync for all my backup scripts. It is fast and easy.
NASDISK=192.168.x.x:/volume1/backup/myserver # the NAS station
ARGMNTS="-rptgoDLKve ssh --delete-excluded --safe-links --exclude-from=/path-to-my-file/rsync_exclude"
# for a daily copy on weekdays (5 copies)
if [ `date +%u` -lt 6 ];
then weekday=`date +%w-%A`
# for rotating every day (2 copies) uncomment the following line in lieu of the above
#if [ $(( `date +%w` % 2 )) -eq 0 ]; then weekday=1 else weekday=2 fi command="/var/vmail/ $NASDISK/$weekday/var/vmail/"
echo "syncing $command"
if rsync $ARGMNTS $command
then log="$log `date +%d-%m-%G\ %k:%M:%m` | `basename $0` | Synchronised | $command "
ERROR=1 log="$log `date +%d-%m-%G\ %k:%M:%m` | `basename $0` | Error | $command ($?) "
if [ "x$ERROR" != "x0" ] ;
then echo "$log" | mailx -s "Error on gateway: `basename $0`" $EMAILID
echo "$log" >> $LOGFILE
Put this in your crontab
vim crontab -e
and add something like the following for a working day of 9 to 6 only. The /dev/null prevents your mailbox to get flooded with useless mails. You only want to receive a mail when something goes wrong.
10 10-19 * * 1-5 /path-to-my-file/backup-cron &> /dev/null