I have a Drobo and I would like to back it up offsite. I have been using a USB Hard Drive to back it up on site, however I would like to move the Hard Drive off site. To remotely connect to it I can use a PogoPlug device or an Airport Extreme device to access it. I believe the PogoPlug device mounts the offsite hard drive using an odd format, however the PogoPlug does have software for backing up files. Using this proprietary software I believe that if choose this I am stuck with it. I feel like I would rather use something that just mirrors the drive, something as basic as rsync, which I have only heard of. I have looked at using Carbon Copy Cloner or SuperDuper with the Hard Drive connected as an Air Disk but I believe those solutions require backing up the drive to a spare disk image on the off site drive. Any ideas on how I should accomplish this task?