I need a backup plan for the media stored on my server. I have 12 terabytes of storage spread over 3 drives (not full) and a 8 terabyte drive for backups. The backup drive is now full. How could I continue the backups to another drive and have it incremental? I have been using the USBbackup plugin which worked great until the disk was full. How could I continue to a second backup drive? Any suggestions?