Small-business with Windows 7 Professional machine being used as a file server and to pull certain files from 8 client machines (7 PCs, one Mac) for backup. Once a day the backed-up files are copied to an external drive that goes home with somebody. There are two external drives that take turns being the go-home drive each day. That is it. No "cloud" storage, no fancy stuff, just what I give above. Backups need to be automated and reliable. Not interested in "free" software or hacks. Need business-quality. I appear to have have several options for backup software, the most likely being: 1) Windows 7's built-in backup software 2) Acronis (so many versions!!!) 3) Norton Ghost. Any opinions on which of the above three are best for the use given above?