Hi to all, There is this ~ 14TB NAS that is connected to a network. It is about 5TB full. I noticed that there is no backup for it and the guys working on the network didn't know any better. Anyways, it wasn't hard to explain that losing 5TB of data is a disaster, so I'm working on a backup solution for them. I did copy the entire array to another location but I want to use an automated way of backing up or at least semi-auto. We have another NAS which we can use (We also have a large external hard drive ~ 10TB). Is there a software which can do a full backup from one NAS to another, and then keep doing differential backups when the user requests so? Full backup one time, then keep doing differentials seems to be the most convenient. Or should I just use a syncing program and make it update my manual full backup every now and then or every --insert time interval-- that I specify? I remember using allwaysync at one point in time. It was a neat software. The NAS is synology DS1515+. It is currently setup as RAID5 which at least provides one disk fault tolerance. The 2nd NAS is DS1517+. Sorry if I sound too stupid but I'm interested on how you guys back up your huge NAS's...you should know better.