I'm trying to configure SBS backup on a new SBS2008 Server. This server has a RAID5 Array using 4 1Tb Drives, with 2 virtual disks created. One is a 250Gb C drive with the os installed, and the other a 2.6Gb Data Partition (partitioned as a GUID Partition Table) containing exchange data and users shared folders. We have a 4Tb USB drive which i partitioned (again using GUID Partition Table) for the backup, but whenever i try and configure the backup i get a message saying that it cannot configure the backup schedule. I've read elasewhere (SBS Blogs) that if the backup drive isnt big enough to contain the complete volumes to be backed up you can get this message, but as you can see my backup drive is of adequate size. I suspect its down to using GUID partiton tables, but i'd quite like confirmation from the experts here and some suggestions on how to alleviate this issue.