Every machine we have has local backup in the form of a sizable external USB drive. Some also backup to a network drive. Windows and Mac. With dozens of machines it is hard to justify paying for remote backup. Although, every time I say or think this I also think: fire, theft, earthquake. I wish there were a reasonably priced multi-machine remote backup service at an affordable price with storage measured in terabytes. One hundred gigs doesn't even begin to scratch the surface.