I need to backup an account right now and I would like to keep that backup forever. I am going to delete everything over 2 years old in the account and if the user decides she needs one of those emails I can temporarily restore it to a different account and have her login to it to retrieve the email. But is there a way I could create the backup and make it so it doesn't get deleted after 30 days and keep it on the same box? If I put it in a new directory under /opt/zimbra/backup would that prevent it from being deleted? I can't seem to find this information anywhere.