So I have a Mac and a (3/4ths full) 1TB External HDD that I frequently disconnect and use with other computers. I've had too many internal and external HDDs die this year, so I've finally decided to embrace the cloud. I tried Crashplan, but every time that I disconnected the external HDD and made any changes to it on another computer, Crashplan failed to see the changes and required that I first have Spotlight reindex the drive and then have Crashplan backup almost the entire drive again. Clearly this isn't going to work. Does anyone have any better suggestions? Thanks!