Hi, Have been using Zextras backup for many months for one customer who has limited internet bandwidth. He has the NE edition which has been building up redo logs for some time. When I try to use the Zimbra backup to tidy this us before turning on delete of redo logs after rollover, the Zimbra backup fails with "ParallelZipCopier stopped due to earlier error: Input/output error" on every active mailbox. I would assume that it is because it is trying to copy the redo files into the backup. There is plenty of disk space. I have now tried to delete older redo logs manually (carefully left more recent redo logs). Even after this the error still persists so it is impossible to do any Zimbra backup. Although I prefer to use Zextras backup, it does concern me that I can not solve this error. I have searched various forums but there is hardly any mention of this error. Help would be most appreciated.